helged Posted November 22, 2015 Share #1 Posted November 22, 2015 Advertisement (gone after registration) Reddish/pinkish (and sometimes greenish) edges on images of snow or clouds or white beaches or buildings are not to everyones liking. The miscolouring can be fixed in postprocessing (Corner Fix, Flat Field, etc.), so in contrast to edge/corner smearing, lens cast is not detrimental for the image - although the pixel quality degrades. The problem was disturbing on the M9 (at least on the body that I had back in time), less so on the M240 - but what with the SL? One highly appreciated wide angle lens is the 21mm Super-Elmar-M f/ 3.4 ASPH. Attached are two test shots of a white card board with the 21SEM on the M240 (upper image) and the SL. In both cases, the lens was set on infinity and the aperture was f6.7 (mimicking a landscape shot), and the metering was +1 1/3 stop. Based on this (and other tests), the miscolouring of the SL with the 21SEM is weak to non-existent and likely a non-issue in most cases. This does not guarantee that SL is good for all wide angle lenses, but WATE and 21SEM appears to be "safe". Good. nb: the somewhat darker bottom left and right corners are likely caused by uneven illumination of the card board. 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! 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/253485-sl-and-wide-angle-miscolouring-or-not/?do=findComment&comment=2934746'>More sharing options...
Advertisement Posted November 22, 2015 Posted November 22, 2015 Hi helged, Take a look here SL and wide angle miscolouring (or not). I'm sure you'll find what you were looking for!
svenjosh Posted November 22, 2015 Share #2 Posted November 22, 2015 Looks good!! Did you notice any smearing at all using the 21 SEM? Thanks Link to post Share on other sites More sharing options...
jonoslack Posted November 22, 2015 Share #3 Posted November 22, 2015 Indeed, I've not found it to be an issue. I've not found any smearing with any lens - although when you do real corner testing at infinity the curvature of field on some lenses can have surprising effects Link to post Share on other sites More sharing options...
svenjosh Posted November 23, 2015 Share #4 Posted November 23, 2015 Thanks Jono, 21 sem is THE favorite wide angle lens for me and I use it quite a lot. Unfortunately this lens was almost unusable with Sony A7 series for my personal needs (I know there are others who disagree with me but I am talking about my personal use). So I am really looking forward to using this lens with Leica SL as composing and focusing will be lot easier with EVF than my M9. Link to post Share on other sites More sharing options...
Malvolio Posted November 23, 2015 Share #5 Posted November 23, 2015 Has anyone does any extensive testing with the 28 Cron on the SL? Link to post Share on other sites More sharing options...
edwardkaraa Posted November 23, 2015 Share #6 Posted November 23, 2015 Thank you for the test helged. Are these photos taken without lens profiles? Is it even possible to turn off the lens corrections on the SL (with coded lenses) ? Link to post Share on other sites More sharing options...
ramarren Posted November 23, 2015 Share #7 Posted November 23, 2015 Advertisement (gone after registration) Thank you, helped. I have to pull out the Elmar-M 24, Color Skopar 28/3.5, and Color Skopar 35/2.5 lenses and do some "white wall" testing with them. The Elmar is coded, the SL senses that and locks the Lens Code menu. The Color Skopars are not, you have the choice of OFF or any of the M lens codes. I'll test with both OFF and my usual lens code settings with them. So far, I've been concentrating on the R lenses: my results are showing no color shading (using the R lens codes) with the Elmarit-R 19/2.8, 24/2.8 and Summicron-R 35/2 lenses. Link to post Share on other sites More sharing options...
digitalfx Posted November 23, 2015 Share #8 Posted November 23, 2015 Thank you for the test helged. Are these photos taken without lens profiles? Is it even possible to turn off the lens corrections on the SL (with coded lenses) ? I don't think you can, but why would you want to? If you think every lens just magically works without corrections, the answer is a big NO. The fact that all of the lenses tested so far are corrected and look pretty damn good is huge. Im not sure why people think digital corrections are a bad thing. Its the only way that a camera can work with multiple lenses produced over many years and is a huge benefit. Personally I am finding the SL is an exceptional body for my nice assortment of M and R glass...for me this is a major plus. I actually am finding the SL and Noctilux combination in particular a perfect pairing. The SL is significantly faster than the M240 and IMO I can focus faster and shoot faster with the combo. There are times, especially when shooting kids that the M buffer was a hinderance and caused me to miss moments. This is now completely gone with the SL. And being able to focus without using the focus aid is not only possible, but easy to do. eliminating the need to focus/reframe which also caused me to miss focus. I have a 24mm Summilux and I'll try to test it this week. Its not nearly as easy to focus without the aids, but I'm anxious to see the results on the SL compared to the M240. Based on the reports above, I expect it to excel as well and am certain it also has in camera corrections. Link to post Share on other sites More sharing options...
helged Posted November 23, 2015 Author Share #9 Posted November 23, 2015 Thank you for the test helged. Are these photos taken without lens profiles? Is it even possible to turn off the lens corrections on the SL (with coded lenses) ? Hi - I have only examined the images with the in-camera lens profiles activated - simply because this is what I use. But will can redo the test (also with the 28 Cron) with/without in-camera corrections. The complicating factor is to find a time window with daylight (short days in Norway at this time of the year...). Link to post Share on other sites More sharing options...
edwardkaraa Posted November 24, 2015 Share #10 Posted November 24, 2015 Hi - I have only examined the images with the in-camera lens profiles activated - simply because this is what I use. But will can redo the test (also with the 28 Cron) with/without in-camera corrections. The complicating factor is to find a time window with daylight (short days in Norway at this time of the year...). Hi Helged. The reason I'm asking is because the M240 shot shows more color shading than I would have expected so I thought you turned off the lens corrections. Link to post Share on other sites More sharing options...
jonoslack Posted November 24, 2015 Share #11 Posted November 24, 2015 Has anyone does any extensive testing with the 28 Cron on the SL? Hi There Yes - I have, but more to do with corner smearing than colour shift - which I've not found to be any kind of issue on any lens - I'm trying to find some time to work it up into an article over the next few days Hi - I have only examined the images with the in-camera lens profiles activated - simply because this is what I use. But will can redo the test (also with the 28 Cron) with/without in-camera corrections. The complicating factor is to find a time window with daylight (short days in Norway at this time of the year...). Hi Helget It's pretty tough here in england as well - especially as it's really at infinity that the problems are most likely to occur (when the rear element is closest to the sensor). . . . good clear sky with even light and not too much wind . . . is not an easy option here in November - and I guess it's worse with you! Link to post Share on other sites More sharing options...
helged Posted November 24, 2015 Author Share #12 Posted November 24, 2015 A quick test with 28Cron-M (as above), M240 first, thereafter SL (with in-camera corrections activated on both bodies). Some colouring on M240, less (almost absent) on the SL. 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! 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/253485-sl-and-wide-angle-miscolouring-or-not/?do=findComment&comment=2935876'>More sharing options...
scott kirkpatrick Posted November 24, 2015 Share #13 Posted November 24, 2015 I usually do the white wall test with an indoor white wall, daylight from the windows, and the lens at infinity, while the wall is one or two feet away. After all, it doesn't have to be in focus. The SL looks pretty good on both vignetting and color. Since the correction in firmware can't know the aperture for sure and thus doesn't change with aperture, testing should be at f/5.6 to check for overcorrection. This doesn't seem to be a problem. Running these wide open should show some vignetting (dark corners) because that's what lenses do. I don't think the color shifts depend on aperture. scott Link to post Share on other sites More sharing options...
edwardkaraa Posted November 24, 2015 Share #14 Posted November 24, 2015 In my experience color shift is strongest at infinity focus, but as mentioned by Scott, the lens doesn't need to be in focus. I'm still not sure about the aperture though. It looks like the shift is less at wide apertures, but it may be due to vignetting hiding the shift or due to lenses being shot at closer distance when wide open. Link to post Share on other sites More sharing options...
jonoslack Posted November 24, 2015 Share #15 Posted November 24, 2015 Colour shift is a real minefield . . . . But the SL seems to have it thoroughly cracked - I've given up thinking about it! Link to post Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.