imported_reinierv Posted April 29, 2009 Share #1 Posted April 29, 2009 (edited) Advertisement (gone after registration) I have been shooting with the M8 (FW2.002) and a VC15 (f8 or f5.6) with IR filter in a few assignements recently. When I came home these were the results, simply horrible and unusable. As you can see the center is more red, while the corners are more green, over-all the white-balance is way, way off. There is no way I can sell this to a customer and getting it right will be a horrorjob. The 3th pic is from a D200 in the same circumstances as the 2nd. White ballance dead on and only some curve adjusting required I wonder when the point comes I had enough of this and sell the stuff, I simply do not trust it anymore... Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Edited April 29, 2009 by imported_reinierv Quote Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/83528-what-is-this-crp/?do=findComment&comment=884645'>More sharing options...
Advertisement Posted April 29, 2009 Posted April 29, 2009 Hi imported_reinierv, Take a look here what is this cr*p. I'm sure you'll find what you were looking for!
andreas_thomsen Posted April 29, 2009 Share #2 Posted April 29, 2009 simple answer: buy leica lenses instead of CV? cheers Quote Link to post Share on other sites More sharing options...
LotharZhou Posted April 29, 2009 Share #3 Posted April 29, 2009 I had experience with my CV 35mm f2.5 with a large green rectangular area in my pictures, And for 3 days all my pictures took in Paris are not usable, the right edge on the photos all distorted and blurred, showing strong double shadows. nearly 700 pictures. I send it back to my dealer and waiting for a solution, I don't trust it anymore either. Quote Link to post Share on other sites More sharing options...
dpattinson Posted April 29, 2009 Share #4 Posted April 29, 2009 Did you try using the CV lens on the D200? Seriously though - the M8 needs a UV/IR filter, furthermore it needs colour vignetting correction for wide lenses when using a UV/IR filter. This means your lens needs to be coded, and for a CV lens the correction will always be approximate. You should already know this. Perhaps cornerfix would help to remove the cyan vignetting. That's what it was designed for. You can find it here: Download CornerFix 1.0.0.0 - Free and open source devignetting application for Leica M8 digital cameras - Softpedia Quote Link to post Share on other sites More sharing options...
stunsworth Posted April 29, 2009 Share #5 Posted April 29, 2009 (edited) Was the CV lens coded? These look like what I'd excpect if a filter was used on the wide angle lens without coding. As mentioned above use Cornerfix to correct the issues, otherwise buy a codable adaptor from John Milich and use that. It isn't a case of trusting it, it's a case of knowing how to use it. If the whole filter/coding thing is too much for you then move on. Edited April 29, 2009 by stunsworth Quote Link to post Share on other sites More sharing options...
LotharZhou Posted April 29, 2009 Share #6 Posted April 29, 2009 just got my answer from the dealer, it's obviously a quality issue from Cosina. They have sent it back to Japan and I have to wait. Quote Link to post Share on other sites More sharing options...
jaapv Posted April 29, 2009 Share #7 Posted April 29, 2009 (edited) Advertisement (gone after registration) Yes, my CV 15 does exactly the same in high-IR light. Even with filter and coding. Make a layer with the right vignetting and feathering, apply Lab colour mode, change the contrast curve in the "a" channel to the correct colourbalance, switch to aRGB again and merge. Three minutes work, if that. Hardly a horror-job I would say. You can even turn it into a mask and use it on all shots, cutting your time down to 15 secs per image. Next time use the WATE. Edited April 29, 2009 by jaapv Quote Link to post Share on other sites More sharing options...
St Clair Posted April 29, 2009 Share #8 Posted April 29, 2009 Doesn't seem to be anything wrong with the lens. Just looks like a severe case of cyan drift in the corners which results from un-coded lenses as others have suggested. Maybe you should turn your good hear and listen... Quote Link to post Share on other sites More sharing options...
biglouis Posted April 29, 2009 Share #9 Posted April 29, 2009 I really think the lens is to blame here. Firstly, I always had these kind of problems with my CV15 even though I had a Milich adaptor and had it coded as a WATE. In a lot of cases I would have to adjust the colour drift and vignetting. Jaapv is giving you good advice about post processing. Secondly, I do not have these problem with my WATE but there again it is approximately ten times the price (new) of a the CV15 and properly coded. I'm sorry but if you are a professional then you need the tools for the job and wonderful as the CV15 is, you are taking chances using it for professional work - unless - you are willing to put in the effort in PS/CS3. LouisB Quote Link to post Share on other sites More sharing options...
carstenw Posted April 29, 2009 Share #10 Posted April 29, 2009 It looks like both failures here (imported_reinierv and LotharZhou) could have been easily avoided, simply by doing some test shots before leaving. In the case of imported_reinierv, a little previous research would have revealed the need for an IR filter and CornerFix in advance. This is not professional behaviour. And incidentally, with a Leica lens and IR filter, there would have been no problem. The tools were poorly researched and poorly chosen for the given task. What ever happened to due diligence? Quote Link to post Share on other sites More sharing options...
gwelland Posted April 29, 2009 Share #11 Posted April 29, 2009 1) Download CornerFix 2) Shoot a reference image with IR filter using a white or uniform subject. 3) Load the reference image into CornerFix and create a CV 15 correction profile. 4) Run these NEF files (I assume they ARE raw btw) through CornerFix using the profile you created. 5) You may need to tweak & repeat 4 by adjusting the strength of the correction. Karma should return at some point after this ... hopefully. Quote Link to post Share on other sites More sharing options...
biglouis Posted April 29, 2009 Share #12 Posted April 29, 2009 It looks like both failures here (imported_reinierv and LotharZhou) could have been easily avoided, simply by doing some test shots before leaving. In the case of imported_reinierv, a little previous research would have revealed the need for an IR filter and CornerFix in advance. This is not professional behaviour. And incidentally, with a Leica lens and IR filter, there would have been no problem. The tools were poorly researched and poorly chosen for the given task. What ever happened to due diligence? Carsten, you are perhaps being a tad severe. We all make mistakes. BTW, this is what is possible with an uncoded, unfiltered CV on an M8. You'll notice some redness in the corners which I could not be bothered to fix: http://www.l-camera-forum.com/leica-forum/architecture/56644-euston-building-underpass.html LouisB Quote Link to post Share on other sites More sharing options...
imported_reinierv Posted April 29, 2009 Author Share #13 Posted April 29, 2009 (edited) odd things is that is many other situations there was no problem at all, maybe some vignetting but the color was ok this means that making a standard improvement process will not work As I understand from jaap is that this will be depending on the IR levels at the time. In the first pic I can image that, bright sunlight present, but the 2nd, between the wood should have been no problem imo Edited April 29, 2009 by imported_reinierv Quote Link to post Share on other sites More sharing options...
jaapv Posted April 29, 2009 Share #14 Posted April 29, 2009 (edited) Yes, Reinier, that is a correct observation. The amount of IR present in the light is of influence, these were outside, maybe at noon, and on a beautiful clear day -IR splashing over everything. In the woodwork, look at the ground: clear sand and concrete, the perfect IR reflector...The rest of the colour being off may well be the AWB trying to compensate for the corners. Btw. your annoyance is quite understandable, athough not really justified. I would be hopping mad as well.... Edited April 29, 2009 by jaapv Quote Link to post Share on other sites More sharing options...
epand56 Posted April 29, 2009 Share #15 Posted April 29, 2009 By the way, Reinier, what the hell is that bunch of wood in your pictures? It looks amazing but I do not understand what's the use of all that carpentry... Quote Link to post Share on other sites More sharing options...
larry Posted April 29, 2009 Share #16 Posted April 29, 2009 By the way, Reinier, what the hell is that bunch of wood in your pictures? It looks amazing but I do not understand what's the use of all that carpentry... It's a roller coaster. Quote Link to post Share on other sites More sharing options...
imported_reinierv Posted April 29, 2009 Author Share #17 Posted April 29, 2009 very good larry I made a reportage-portret of a rollercoaster-maintenance guy for a builders magazine it is a lot of fun doing a shoot in such objects Quote Link to post Share on other sites More sharing options...
imported_reinierv Posted April 29, 2009 Author Share #18 Posted April 29, 2009 (edited) here is a more straigh-forward example It is the highest (38mtr) and fastest (I know ;-)) wooden rollercoaster in western-Europe, located near Venlo, in Tover(magic)land Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Edited April 29, 2009 by imported_reinierv Quote Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/83528-what-is-this-crp/?do=findComment&comment=884866'>More sharing options...
imported_reinierv Posted April 29, 2009 Author Share #19 Posted April 29, 2009 Well...explain this... the first pic is with Lens detection ON+IR, on uncoded lens VC 15 2nd pic is Lens detecton OFF, on uncoded lens VC15 both of f8 so vigneting should be close to none both images look horrible Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Quote Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/83528-what-is-this-crp/?do=findComment&comment=884929'>More sharing options...
Jamie Roberts Posted April 29, 2009 Share #20 Posted April 29, 2009 Yes they look awful, but they look awful because you really do need to code wide angle lenses on the M8. So the optical vignette is affected by aperture (you say there should be none, and there isn't), but the colour vignette will be there regardless of aperture, because that's inherent to the M8's design (a microlens / angle issue, IIRC). The easy solution is to code the lens (as an 18mm) and then the camera will compensate for the cyan corners. Or Cornerfix will fix them; or you can do it yourself in LAB mode in PS, where you will only affect the colour and not the luminance. Quote Link to post Share on other sites More sharing options...
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