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Posts Tagged ‘raw’

A really strange sense of deja vu

March 3, 2010 9 comments

Subtitled…
Once again into The Bear P1020949

Strange how compulsive this blogging nonsense can become. In an underhanded, sneaky, creeping up from behind and jumping out on you when you’re least expecting it sort of way.

There’s me, not having blogged anything for, oh, at least five or six days when it gradually dawns on me that I’m beginning to feel something. A vaguely uncomfortable sort of something. A vaguely sort of guilty type something. As though I haven’t done something I should have done.
A vaguely sort of guilty type something seeming to be reinforced by the awareness that its the beginning of a new month.

And then it clicks. I’ve not yet heralded the month in with… um… er… a post to the blog!

Dammit, this is just not good enough. In fact, its bloody disgusting!

Not that I haven’t posted anything but that I should actually be starting to feel guilty about not having posted anything. Ridiculous! Who the hell cares anyway? It really is about time I got meself a life I suspect.

So here we are then, the very first post of March 2010, and what have I to say for myself?
More specifically, what new photochat can I share with all? Given that this is supposed to be some sort of photoblog. Or at the very least, related to photography in some tenuous and distant fashion.

Well, ok, photography then…

Strange how compulsive this photography nonsense can become. In an underhanded, sneaky, creeping up from behind and jumping out on you when you’re least expecting it sort of way.

There’s me, not having taken any pics for, oh, at least… er, hang on a minute. Why I am now getting a really strange sense of deja vu?

Its true though. My clicky finger, like my fumbling with the keyboard finger, appears to have been somewhat idle of late. Come to think of it, I do believe its actually the same finger, but I’m sure that’s just coincidence. And I also suspect its not been totally idle… but best we don’t get into what other uses to which I may have been putting it.

However in my own defence I have to say that I’ve not been completely idle in photo-related matters.
In fact, I’ve actually been quite busy. And I fully intended to blog about this busyness… though I haven’t yet managed to drum up sufficient motivation to set it all down on paper. Er… virtual paper that is.
I haven’t even really managed to assemble my thoughts about the whole busyness into any sort of coherent order yet. Nothing particularly unusual there though.

All of which means that, hopefully, sometime within the next few something or others I shall be pleased to reveal some really new and exciting news… unique and exclusive to this ‘ere blog! Wow!

That’s why its called “news” incidentally. Cos its… er… new.

Except, by the time I get to write about it the newness will have worn off, and its not really all that exciting anyway.

But hey, it seemed like a good phrase to use.

And my first pics of the new month? Well, what a surprise. Back in my old haunt, The Bear pub. How totally unusual. Ahem.

Once again into The Bear P1020943

However, there is a bit of a twist on this most recent batch. Cos they’re taken with the Lumix… but in colour! Which is really strange cos the default setting for it has tended to be black and white. As some more observant types may have noticed.

I’ve done a few colour shots with it in the past and have been quite pleased with the result. And the other day, embarking on a little jaunt where I anticipated a few pics may have been required (and circumstances being such as to not permit me to take the larger camera) I hauled along the Lumix and changed the setting to colour for just in case. Cos I’m like that.

The actual pics never materialised but I forgot to reset the camera, so when I dragged it out of its bag today I decided on the spur of the moment to leave it as it was and fire away. Cos I’m like that as well.

And once again I find myself quite pleased with the way it renders colours. Have to say its proving to be quite a pleasing little camera all round. And real fun to use.
If only the damn files were of slightly better quality. And if only my antiquated version of Lightroom would read the RAW files it produces so I wouldn’t have to keep on shooting JPEGs. But then again, if only’s never achieved anything. Just get on and make the best of what you’ve got has always been my motto. Well, one of them at least.

Once again into The Bear P1020981

Once again into The Bear P1020987

Once again into The Bear P1020935

P.S. For the techie types, the foregoing pics were shot in Aperture Priority, all other camera settings at the default (i.e. auto) with “Quality” set to max for JPEGs except for: Sharpness at +2, Saturation at -1, and Noise Reduction at +2. In Lightroom (for most of them) I applied Autotone and the standard Punch preset, max noise reduction on the Luminance slider and that was about it. Oh, I think I had to knock the exposure down a third of a stop on a couple of them and similarly white balance had to be tweaked ever so slightly on a couple of them. But, aside from the over-the-top noise reduction those are the sort of adjustments I’d expect to apply anyway.
So, as the subtitle says…

This is not the camera its meant to be

October 21, 2009 5 comments

Lumix FZ38 _G100265

… or indeed the camera I’d originally intended to get. Oh dear me no.

Y’see, ever since totally trashing my last point’n’shoot, a Konica Minolta DiMAGE Z6 (the sad tale’s here if you’re really interested), I’ve been promising myself a replacement. (Nowt wrong with the dSLRs of course… just that sometimes they’re not quite right for the job.)

First choice was a G9, or G10, or G something or other… one of them from the Canon stable anyway.
All well and good, and such is still on my wish list. But I also quite fancied one of them there “bridge” or “ultrazoom” cameras or whatever the hell they’re called cos it’d be absolutely ideal for a coupla little projects I’ve had in mind.

So first choice along those lines was an offering from Olympus. Can’t remember the model number at the mo’ but its their latest apparently… with something stupid like a 28x optical zoom wouldya believe!
Fancied it cos a Flickr chum of mine has one and I’ve been really impressed with the pics he’s pulled off from it. (Nothing to do with the skill of the guy behind the camera of course. Oh no. Couldn’t be anything to do with that.)

However, for various reasons that didn’t materialise.

And what I’ve ended up with instead is this ‘ere Lumix FZ38 from Panasonic.

Not a totally mindless acquisition however cos I’d done some review reading about the little beastie beforehand (most notably this one)… and (more significantly perhaps) I acquired it at substantially less than the normal retail price. Quite substantially in fact.
Not that such a mercenary consideration would have influenced my decision in the slightest of course. Ahem.

Anyway, its a brand new toy for me so I’m still messing around with it… seeing what it can do sorta thing. Or, more to the point, what I can do with it. Or, more accurately perhaps, can’t.

Plus it has all the features that were on my “must have” list…

Ultrazoom (of course!)… 18x optical in fact. Not as “ultra” as some, but good enough for what I have in mind.
Viewfinder (albeit electronic) with diopter adjustment (absolutely essential far as I’m concerned).
Various useful modes in addition to those crappy “scene modes”… Aperture Priority, Shutter Priority, Program, Manual, etc.
And it’ll shoot in RAW… though its some weird format with a .rw2 extension that my version of Lightroom won’t read. Oh pooh. Dammit. Shoulda checked compatability with LR out first. (Though I have a bit of a suspicion that the latest version of LR… 2 point something or other… will read the files.)

Still, a minor detail (relatively) cos the cam comes with a version of Silkypix Developer Studio that seems quite reasonable… once I manage to sus out how the bloody thing works! Prob’ly just end up shooting JPEGs all the time (cos to be honest the quality isn’t quite what I’ve become used to, though fine for web usage. Which is what I’d intended anyway. Er… noise and detail resolution seem to be the main issues at the mo’).

The only real gripe so far (excluding the noise and detail res cos such things are only to be expected really at this sort of level) is the fact that its powered by one of those stupid lithium ion batteries (or whatever they’re called) rather than a set of AAs. And why the hell don’t manufacturers/vendors supply a spare battery in with their kit?
It’d be so damn useful (save having to go hunting for one soon as new kit arrives, and it would ensure that users would have a backup battery of the right spec rather than one of the cheapie lookalikes that could do all sorts of harm… according to the user manuals at least) and I for one certainly wouldn’t object to the few extra quid that might be involved.

However, here it is; me new toy…

Lumix FZ38 _G100263

Lumix FZ38 _G100266

Oh… and it’ll also shoot video. As if I cared about that. If I’d wanted to shoot video I’d have got a bloody videocam wouldn’t I?

Er… I think I did in fact. Oops.

Samsung GX20 update

October 9, 2008 5 comments

Regular visitors here may recollect the travails I had with my newest camera, the Samsung GX20 (latest dSLR addition to their line, and their “flagship” camera so to speak).

Said regular visitors may also have noted how strangely quiet I’ve been on this topic of late.

Couple of reasons for this.

Firstly, the file sizes (in RAW format) produced by the camera are quite… er… “substantial” and the computer I use for processing pics found itself being taxed to the limit in handling them. RAM upgrade called for, and until such time as I organise that I’ve been a bit reluctant to use the camera, preferring to revert to its less highly spec’d brother the GX10.

And secondly, in my exploring those “travails” to the fullest I’d begun to develop certain suspicions regarding the primary cause of the perceived colour balance problem.
Suspicions that I was a bit wary about articulating until I’d done some rather more exhaustive testing, particularly given that my experience in these matters is somewhat… um… “limited” shall we say.

Well, I’ve now done some more testing of the sort I had in mind. Not exhaustive admittedly. I have still to try the “test setup” out under a more extensive range of lighting conditions for absolute confirmation, but initial results seem to be confirming what I’d begun to suspect.

Tuesday last I attached the brand new Sigma 17-70mm f/2.8-4.5 DC Macro lens (this post refers) to the GX20 and had a session under rather dismal lighting conditions.
Importing the resulting RAW files into Adobe Lightroom (Lightoom be it noted, not the RAW converter app that came with the camera) and using the bog-standard ACR 4.4 option that comes with version 1.4.1 of Lightroom (rather than the “embed” in the RAW file itself) I processed them into JPEGs… in some instances I tweaked the exposure, saturation, sharpness etc but in no single case did I have to significantly manipulate the colour or white balance.
Yet, looking at the resulting pics on three different machines, and in both Lightroom and after uploaded to Flickr, I can find little evidence of the huge colour imbalance (with a strong bias toward the magenta) that seemed to afflict earlier shots taken with the camera. That’s not to say there isn’t still a colour cast… there is, but nowhere near to the same degree.

And such a result does indeed point to my slowly dawning suspicion having some merit. Which was that whilst the app-dependent rendering of the RAW file may have been somewhat a culprit, as too may the newly-developed joint Samsung/Pentax sensor have been in part responsible, the principal culprit is the kit lens that came with the camera.

Bizarre maybe, but all the indications are pointing in that direction!

So watch this space!

_G201144

Just not gonna give in

July 26, 2008 9 comments

The tussle with the GX20 continues! (See immediately previous posts)

Or rather, with its colour balance.

Or rather, with the apparent inability of Adobe Lightroom to render an accurate colour balance from RAW files produced by the GX20.

Well, I’m not having any of it!

Having begun to suspect some fundamental flaw in the way the Samsung GX20 was processing shots in-camera, I’m now beginning to backtrack from that a little bit.
Even using the software that’s supplied with the camera (Samsung RAW Converter 2.0) some tweaking appeared to be necessary to mitigate the effects of what appears to be a bias in favour of the red/magenta/purple spectrum in the darker (shadow) areas. And, almost without exception, the shots seem to be over-saturated. (Compensating for this is still causing me a few problems… but I’m getting there, slowly… largely by trial and error!)

In the course of trying to tackle this issue I’ve received suggestions from a number of people, quite a few of which have referred to various camera settings. But, being a bit of a Doubting Thomas by nature these suggestions have done little other than cause me to do a bit more in-depth reading about RAW files themselves.
Out of which emerged the fact that most of the camera settings (white balance, saturation, contrast, sharpness etc., and more especially the range of “digital colour filters”) only really have an impact on JPEGs; if one’s shooting exclusively in RAW (as I now do by default) they make no difference whatsoever. For all intents and purposes the only settings that impact RAW files are ISO, shutter speed, and aperture.
(This pdf from Adobe makes quite an interesting, and sufficiently short/non-technical, read!)

Thus, theoretically, any RAW converter app worth its salt should be able to satisfactorily process files from the camera… assuming it supports the DNG format that is.

Which Adobe Lightroom does! And given that Lightroom is my app of choice (for all sorts of reasons, not least of which is familiarity with the interface, and a few extra features that other RAW converters don’t seem to possess) I’m buggered if I’m going to be forced into using Samsung’s own RAW converter if I can possibly avoid it.

So, adopting “persistence” as my middle name, I repaired to my favourite watering hole (where, as frequenters of this blog and my Flickr photostream will already know, lighting conditions are somewhat “curious”) and fired off another batch of test shots.
Which I then processed entirely using Adobe Lightroom and utilising an import preset I’d configured to compensate for the apparent under-exposure and over-saturation that had seemed to be the hallmark of GX20 shots. And, I have to say, I’m not entirely dissatisfied with the results.
Whether this will be equally successful under other lighting conditions remains to be seen, but I’m not prepared to give in just yet!

Oh, perhaps I should also mention that this batch of shots were intended purely for me to play with exposure/colour/saturation… in terms of composition and focus (indoors, variable lighting, hand-held) well, basically they’re crap. So bear that in mind!

_G200551 _G200542

_G200546 _G200541

_G200549 _G200538

What makes this whole issue incredibly irritating, aside from the fact that I’m actually having to work at producing even half-way decent pics (which seriously goes against my nature) is that the price-bracket of this camera (in the UK at least) suggests its not aimed at the dSLR entry-level market but at the “serious” enthusiast, with aspirations to targetting the semi-pro market also.
In consequence of which I really did expect a somewhat better performance.

GX20… the continuing story

July 20, 2008 5 comments

And now for the next enthralling episode about the breaking-in of the GX20.
Breaking in, smashing up… they’re only separated by the extent of my patience.
For the story so far read this.

So, to continue…

Well, now I come to think about it there’s not really a lot to add. I’ve confirmed, and indeed re-confirmed, that the Samsung GX20’s RAW files are rendered quite nicely with the supplied software (Samsung RAW Converter 2.0). But with my second testing of this I took it a stage further and developed a JPEG from the RAW file (full size, 100% quality) then inspected the resulting image not in my normal “quick and dirty” image browser (XNView – which actually doesn’t do any favours to pictures whatsoever) or even in Lightroom, but with Samsung’s own Samsung Master (their JPEG-editing app).

Yep. It’ll do for me. I have still to do some extensive testing under a variety of more rigorous lighting conditions of course, but I don’t really anticipate any major problems at all now.
Checking for a second opinion with the oracle whom I’d consulted previously, he suspected (though was by no means certain) there is still a hint of a magenta boost, but nothing especially significant.

By now feeling a bit more positive and adventurous, thought I’d try something else (being careful not to get too carried away of course).

As the Samsung RAW Converter has virtually sorted out the colour problem with the GX20, what about the GX10 I wondered?
Possibly having mentioned it once or twice here on the blog, but definitely having referred to it a few times on my Flickr photostream, shots from the GX10 have nearly always seemed to exhibit a somewhat blueish tone. Although I’ve been aware of it, and have occasionally sought to minimise it, the imbalance has never really bothered me as it tends (in my opinion anyway) to give the pics a rather “clean” attractive quality. But its niggled away in the back of my mind that its not quite as accurate a rendition as I’d like.

Thus, call up a few RAWs from the GX10 in the converter and, whaddya know? The blue’s gone! Sorted!

But this is where I start getting a bit silly.

So if the Samsung converter works pretty well with the Samsung files (no… I don’t, repeat don’t, want to hear anyone mutter “Well, that’s obvious isn’t it, you plonker!” Remember, I’m a self-confessed idiot) then how would the Canon converter (Digital Photo Professional) work with files from the 400D?
Would it, for example, eliminate that irritating yellowish tint that seems to bedevil a lot of the shots from the camera?
Clearly I was riding the crest of a wave here for the answer, in short, is yes it does!

(Oh… and somewhere along the way I had to make sure that all the relevant apps were reading the right colour profile for my machine. Not the default one but the one generated by my colour calibration thingy.)

However, all of these really great, really positive developments have created something of a dilemma for me. Moreover, a dilemma that I find curiously depressing. Not suicidally depressing admittedly (not yet, anyway), but a sort of “oh bugger” type depressing.

At the very heart of my methodology in dealing with pics (from camera right through processing to uploading to the web, and indeed archiving etc) is the rather delightful Adobe Lightroom.
All the fault of my mate of course. He’d sung its praises as a super general-purpose workhorse for dealing with RAW files.

Er… wait a mo’ though. This was the same “mate” that finally persuaded me to try working in RAW instead of JPEG in the first place. Dammit! That should have been warning enough for me. I dunno, some people just never learn.

Anyway, Adobe Lightroom. It is a super app. The first problem I had with it (and the one that delayed my embracing it fully for a good coupla months) was the interface. Its a bit complex. Not to put too fine a point on it, I couldn’t get my head around it at all. Nothing was where I expected it to be (in fact, I’m still discovering features I never knew it had!), and what I could see in terms of controls and suchlike often didn’t do what I thought they would, but something else entirely. Disconcerting, to say the least!

Naturally I rarely read any help files or manuals. That’s far too much like hard work for me. If the hands-on approach don’t crack it then it ain’t worth bothering with… that’s my philosophy.

I vividly remember my first try-out of it (and this was even before I’d started properly working in RAW (tried it thanks to mate’s badgering, too intimidating, gave up), so was simply doing an edit of a JPEG). Having made the desired changes to the pic, the next obvious step was to do a “Save as”… cos obviously I didn’t want to overwrite the original.
So I looked for the “Save as” button, or link, or something. And looked. And looked.

Weird. There isn’t one. Yet my mate had clearly said (frequently, in a boringly repetitive way) that one of Lightroom’s strong points was its non-destructive editing feature. So it has to offer some sort of a “Save as” option, surely? Perhaps, thinks I, I need to close the program and it’ll pop up a little dialog asking me if I want to save the work, and if so, what as.

So I close the program. No, it doesn’t. And bang goes a fair bit of work. Sod it! That took me back to my very early days in computing when 20Mb (yes, that’s megabytes!) was considered a huge hard drive, and I… no… that’s a story for another day.
(That’s not strictly true actually. The “bang goes a fair bit of work” statement, that is. For I subsequently discovered that Lightroom edits “persist” until one selects the “reset” option for the relevant image/s.)

Anyway, after the obligatory wailing, gnashing of teeth and beating of breast (cos I didn’t know about the “persistence” feature at the time), some head-scratching. Then open the program again and hunt for the “Save as” control. Don’t find it. Sit back, have a think. Then another hunt. Then close the program in disgust. Leave it for a coupla weeks whilst I have a good old sulk.

But eventually irritation gets the better of me. At computers (damn stupid things); at Lightroom (damn stupid program); at my mate (damn stupid… well, perhaps not); at Life in general. So I fire off a quick (and, now I come to think of it, rather pleading) email to him, suggesting that a little bit of guidance in the highly complex task of saving an edit wouldn’t go amiss.

So he, ever patient (knows me too well, obviously), explains.

That button, that big one, the second of those two big buttons down on the left-hand side, the first clearly marked “Import”, the second clearly marked “Export”. Well, try clicking the Export button.

Oh yes. Of course. Blindingly obvious, isn’t it? Duh.

What made the entire episode even more infuriating is that in my saner moments (rare though they may be) I like to consider myself something of a computer geek. I play with them. I work with them. And when I’ve finished working with them, I play with them again. Have done for years. And years. And years.
But see a big button with “Export” marked on it and interpret that as being a “Save as” option? Not a chance. Think I should just pack in all this computer lark here and now.

Having overcome that first major hurdle I began to take to Lightroom like a duck to water.
Twiddle this, slide that, click something or other else. The features are marvellous (and I still haven’t sussed, and probably even discovered, all of them), plus some real snazzy ones that I’ve been unable to find on any other photo-editing prog.
I like the way it works. I like the subtlety and quality of the changes you can make with it. I even like (once I got used to it) the interface! Then I started working with RAW files and wow! The program really comes into its own. Such that its become my photo-editing program of choice. In fact, the only one I ever use… until now, that is.

Criticisms? Yeah, two (until just recently I only had one of course).
First, its use of system resources. Adobe recommends a minimum 1Gb RAM. And the machine I do my photo work on only has 512Mb! Ok, Lightroom runs, and if working with JPEGs there’s no real problem. But RAW files can be another matter entirely.
When working with those from the Canon it wasn’t too bad (though I had to slow down my workflow just a little bit). The GX10 presented somewhat more of a problem with its larger file sizes, and many was the time the machine would just drag its heels or the program would freeze on me until I learned a coupla tricks to overcome the bottlenecks. But files from the GX20? Well, the only way to return to comfortable working would be to increase the RAM. That’s if I continue to use Lightroom of course.

Now in fairness I can’t really say that’s a criticism of the program per se. After all, resource-hungriness isn’t unique to that app… most notable offender being Microsucks themselves of course.

And the second criticism is this most recent discovery… that Lightroom doesn’t support all RAW files equally!
Adobe themselves say…

“The camera raw functionality in Adobe® Photoshop® software provides fast and easy access within Photoshop to the “raw” image formats produced by many leading professional and midrange digital cameras. By working with these “digital negatives,” you can achieve the results you want with greater artistic control and flexibility while still maintaining the original “raw” files.”

They go on to say…

“The Photoshop Camera Raw plug-in (2.3 or higher) now also supports raw files in the DNG format. Find out more about the benefits of the Digital Negative, a publicly documented raw file format recently announced by Adobe.”

At this point I should perhaps explain that Samsung’s RAW files are in the DNG format.
For anyone unfamiliar with this, here (again) is what Adobe themselves (who came up with the format!) have to say about it…

“Raw file formats are becoming extremely popular in digital photography workflows because they offer creative professionals greater creative control. However, cameras can use many different raw formats — the specifications for which are not publicly available — which means that not every raw file can be read by a variety of software applications. As a result, the use of these proprietary raw files as a long-term archival solution carries risk, and sharing these files across complex workflows is even more challenging.

The solution to this growing problem? The Digital Negative (DNG), a publicly available archival format for the raw files generated by digital cameras. By addressing the lack of an open standard for the raw files created by individual camera models, DNG helps ensure that photographers will be able to access their files in the future.”

And finally Adobe, on their own website, specifically list the RAW files produced by both the Samsung GX10 and the GX20 as being supported by Lightroom!

(Quotes from the Adobe Lightroom website apart from the latter which is quoted from www.adobe.com/products/dng/)

I suppose in fairness I have to acknowledge that Lightroom does support the Samsung files, but only in the sense that it will actually read them and translate the data into recognisably an image. But as for rendering it correctly, well, forget it.

Which means I’ve now, finally, come to the source of my “oh bugger” type depression.

For what all this means is that there’s now a high probability that in future I shall have to change my working methodology insofar as using each manufacturer’s proprietary apps for processing pics from both the Samsungs and the Canon.
Doesn’t mean that I shall abandon Lightroom entirely of course. Oh no. I like it far too much for that. It’ll always come in handy as a prog for emergency fixes, or for working with JPEGs, or possibly even (as my mate suggested) working with tiffs (but only when I’ve upgraded the RAM, cos tiff files are bloody huge!).

Well, I think that’s about it for the mo’. And for someone who started off with having “not really a lot to add” I think I’ve probably excelled myself!

Latest on the GX20 saga

July 18, 2008 9 comments

There were three issues that concerned me… under-exposure, loss of detail/resolution, and an inaccurate colour-cast.
There’s also the matter of the large file sizes. Though that’s not really an issue… more of an inconvenience that’ll no longer be a problem once I’ve increased the RAM on my computer.

Taking them in order then:

Under-exposure

This could well be a lens issue and as such I’m not letting myself get too concerned by it until after I’ve tried some shots with a different lens. Its also conceivable that in part its a side-effect of the colour-balance issue, though I doubt it. In any event its fairly easily remedied, either pre- or post- shot, so can hardly be called an “issue” so much as a “quirk”.

Loss of Detail

This was of much greater concern, and the source of much of my initial disappointment.
Of course, this too could have been a lens issue, but equally as well may not have been. And if not, then not so easily remedied. In fact, if a sensor- or processor-related problem then I doubt if it could be remedied at all short of a firmware upgrade maybe. Hence my concern.

However, that impression was formed on the basis of the dozen or so pics I shot with the camera virtually straight out the box (just couldn’t wait, could I?) and conceivably I hadn’t paid quite as much attention either to the settings or in actually taking the shots as I should have done.
And when I inspected the track and river shots I’d done, aside from the persistent colour issue I was much more satisfied.

I subsequently sent one of the RAW files from the river set to a mate for closer scrutiny by a much more experienced eye than mine, and his opinion was, to quote “the GX20 has sort of a clarity that is intriguing, its the detail in the images that is clear and the file looks neat in appearance, think if the white balance is sussed it will be bloody good too”, which really does sum it up quite nicely.
And that’s with the bog-standard lens that came with the camera!

So I think the “loss of detail issue” isn’t an issue after all and can be confidently forgotten.

But there still remains…

Colour Cast

This is clearly a white balance problem and, after looking closely at all the shots, plus taking on board the various comments made about the pics I’d posted to Flickr (which drew attention to either a pink or a purple tone in the shots) I began to suspect (and eventually confirmed to my satisfaction) a problem with the magenta.

With a lot of tinkering in post-processing its possible that the colour can be corrected, but that would inevitably entail a helluva lot of work on each individual image just in getting them to look as they should look. And I’m not at all convinced that configuring a camera-specific preset in Lightroom (my RAW editing app of choice) to do all this work on image import would necessarily be effective for every image taken under a wide range of circumstances.
Now I’m not totally opposed to enhancing a particular colour or manipulating the colour balance at post-processing stage, providing I’m starting out with an image that provides a fairly accurate colour balance! Absent that and one is no longer looking at an artistic interpretation (hmm… please forget I just used the word “artistic”. Don’t know what came over me for a moment there!) but at a flawed image. Not good!

Curiously, this matter of colour balance also seems to be exhibited by the other cameras (blue with the GX10, yellow with the 400D), but nowhere near to the same extent and not with every shot. In other words, the anomalies are at a reasonably acceptable level, and not every pic merits tweaking.

However, it was suggested to me that maybe the problem’s not with the camera itself but with the way its writing RAW files, especially if the version of firmware its using to do this is different to that of the GX10 (which it is).
So two ideas came out of this… either use the RAW conversion software that comes with the camera (which I don’t), or make sure I’ve got the latest stable version of Lightroom (which I hadn’t).

Now, I’ve got the RAW converter app that came with the GX10 installed though I never use it, preferring instead to use Lightroom. So I’d not bothered to install the later version with the GX20, not even having considered using it.
However, I uninstalled the GX10 version then installed the later version… and whaddya know? The shots look fine! (Curiously, they also load a damn sight quicker than with Lightroom.) Not even a hint of colour imbalance.

Feeling a tad more optimistic, I set to thinking… So if its the way the data’s being read as opposed to a flaw in the camera itself (or indeed in its settings), then maybe upgrading to the latest version of Lightroom might render a similar result.
And that’s what I did.

Hmm. Well, Lightroom continued to render the files with a magenta tone bias in the white balance (confirming my original diagnosis at least)… but this time showing that in the control panel as a +10 increase. Which it hadn’t been doing before… or at least, not that I’d noticed.
Knocking that +10 off (to effective 0) I exported some test JPEGs. They were definitely an improvement but, alas, not quite enough. However, this does suggest that if I want to persist in using Lightroom for processing the GX20 files (which is my preferred option) then at least I can overcome the problem relatively easily simply by setting the tone slider for that colour spectrum in the opposite direction.

Whoopee!

But another couple of possibilities emerge from this.

It looks as though, if I use the Samsung-supplied RAW converter I may well be able to see the files rendered as they should without any additional tweaking on my part. And if that’s the case, that further suggests that processing done in-camera will probably be okay, meaning that JPEGs should come straight off-camera fine.

Which of course needs testing. And if that’s the case, then maybe I could use the GX20 principally for shooting JPEGs, reverting to RAW only on really critical shots or where I anticipate a lot of post-processing. (In other words, use it as my main “events” camera.)

Now this may seem a bit of a bizarre approach for using a dSLR, but it does actually have certain merits.
For example, when I did the Carnival Against the Arms Trade shoot in Brighton earlier this year the folk down there were eager to grab some pics urgently (practically straight off-camera) in order to send out to various media (who were squawking for photos) in virtual real-time.
Yet that presented horrendous problems as they simply weren’t geared up to handle RAWs, and neither did they, or I, have the right connector to simply process in-camera and then plug the GX10 into their computer. Nor, weirdly, did they have a card-reader on hand (neither, stupidly, did I!). We came up with a work-around eventually but by that time they’d grabbed initial shots from someone else so I missed out on what could have been a really super opportunity.

Shooting in JPEG (plus carrying a card-reader of course!) would have sorted that problem. In fact, the problem would never have arisen.

(Memo to self… in future be sure to carry a card reader and PC connection cables for both cameras whenever attending an event. I don’t call myself an idiot for nothing y’know!)

Then there’s the matter of the file sizes. Were I to shoot principally in JPEG I wouldn’t have to invest in a lot of new high-capacity cards, nor would I be stretching computer resources to their limits if/when importing the files into Lightroom.

At best this is only a partial solution for it’d only really be relevant to my “events stuff”. Where my “scenic” shots are concerned I think I’d still want to shoot RAW, preferring the much greater flexibility in processing, and quality-retention, that such allows.

Nevertheless, things are looking a lot more hopeful now.

In conclusion then, I have to ask myself how I feel about the camera now.
I won’t claim to be ecstatic. And I’m still mildly disappointed by not having experienced that joy of playing with a new toy that I feel I should have experienced. In that sense, I feel somewhat cheated.

But at least now I don’t have the inclination to chuck the bloody thing straight back to the place from whence it came. In fact, if my mate’s assessment bears out, then the thing will prove to have been a worthwhile acquisition.
And you can be assured, now I’ve started this particular topic I’ll be posting news of later developments.

Well, that’ll be something to look forward to, now won’t it? (Heh heh)

Samsung GX20 colour test #1 and #2

July 14, 2008 2 comments

Clearly there’s some sort of colour issue going on with the GX20, as was revealed by yesterday’s “play shots”.

Well, nothing like the present for starting to tackle this issue, so went out early this morning (bright and sunny) to do a few test shots, concentrating for the purposes of this particular session on the “colour tone” feature of the camera.

I took each shot nine times, corresponding to the available presets in the colour tone setting… standard, red, magenta, blue, cyan, green, yellow, warm, and cool.

However, to avoid totally boring visitors to my Flickr page I’ve only uploaded the first of each series (the “standard” or default colour tone setting).

Other relevant info…

White Balance at the “daylight” setting
Auto ISO
Aperture Priority mode
AdobeRGB colourspace
RAW format

In the pre-shoot “Picture Wizard” settings Saturation was set to +1, Contrast 0 and Sharpness +1

(Theoretically of course when shooting in RAW mode settings such as White Balance, Contrast, Saturation and Sharpness aren’t actually applied to the image, although the information’s saved for when the file’s converted to JPEG (which isn’t strictly true re the white balance… as I discovered on a shoot a few weeks back!). This raises the interesting question of whether or not Lightroom actually reads this data or should one in fact just use the Samsung Raw Converter program that comes with the camera? I sense more experimentation afoot.)

Imported the shots into Lightroom then, with no post processing whatsoever, exported to JPEG at reduced size for web useage (but at 100% quality), also converting to sRGB colourspace.

Comments/observations invited.

(One positive thing that did emerge from this session was that my concerns re detail resolution have been somewhat laid to rest… for the moment!)

_G200080 _G200089

_G200071 _G200061

_G200052

And here are exactly the same shots, but “tweaked” (post-processed). Basically upped the exposure a tad and increased the vibrancy quite substantially…

_G200080 _G200089

_G200071 _G200061

_G200052