OHW Posted February 25, 2021 Share #1 Posted February 25, 2021 (edited) Advertisement (gone after registration) I have read on a local Danish chat site that many people struggle with Cromatic Aberration on many of Leica's SL lenses. The SL24-90 zoom is particularly bad. Can it be confirmed in this forum? Is it the AWB that is creating the problem? Edited February 25, 2021 by OHW Quote Link to post Share on other sites More sharing options...
Advertisement Posted February 25, 2021 Posted February 25, 2021 Hi OHW, Take a look here Cromatic Aberration. I'm sure you'll find what you were looking for!
mikaelrydenfelt Posted February 25, 2021 Share #2 Posted February 25, 2021 Based on my experience (SL24-90 couple years ago and SL50mm F1.4 still nowadays) that sounds odd. In my use, different situations in photojournalism, I have not seen any CA. Quote Link to post Share on other sites More sharing options...
OHW Posted February 25, 2021 Author Share #3 Posted February 25, 2021 It is claimed that problems are greatest when lenses are mounted on the SL2. Quote Link to post Share on other sites More sharing options...
LD_50 Posted February 25, 2021 Share #4 Posted February 25, 2021 There are tests and sample photos available. You can determine whether you would struggle with the results. Quote Link to post Share on other sites More sharing options...
michali Posted February 26, 2021 Share #5 Posted February 26, 2021 11 hours ago, OHW said: I have read on a local Danish chat site that many people struggle with Cromatic Aberration on many of Leica's SL lenses. The SL24-90 zoom is particularly bad. Can it be confirmed in this forum? Is it the AWB that is creating the problem? I've never encountered this problem with the SL 24-90mm & I've used it extensively in a variety of challenging lighting situations on the S1R, SL, SL2 as well as the CL. Quote Link to post Share on other sites More sharing options...
RBB Posted February 26, 2021 Share #6 Posted February 26, 2021 11 hours ago, mikaelrydenfelt said: Based on my experience (SL24-90 couple years ago and SL50mm F1.4 still nowadays) that sounds odd. In my use, different situations in photojournalism, I have not seen any CA. +1 use the 24-90 and 50 Summilux regularly wide open and note never any CA. I use Capture One, Affinity and sometimes Aurora. Quote Link to post Share on other sites More sharing options...
OHW Posted February 26, 2021 Author Share #7 Posted February 26, 2021 (edited) Advertisement (gone after registration) SL2 + Vario Elmarit SL 24-90mm. Exif: 1/250s f/3.5 ISO100 24mm. Filformat DNG Edited February 26, 2021 by OHW The photographer does not want the photo published. He does not want to create a problem for Leica which may not be significant. I'll stop the thread here! Quote Link to post Share on other sites More sharing options...
OHW Posted February 26, 2021 Author Share #8 Posted February 26, 2021 (edited) .. Edited February 26, 2021 by OHW See above! Quote Link to post Share on other sites More sharing options...
jaapv Posted February 26, 2021 Share #9 Posted February 26, 2021 The higher resolving and micro-contrasty a lens-sensor combination is, the more residual (longitudinal) chromatic aberration can become visible in high-contrast situations.This means that the "sharper" a lens/sensor is, the more visible it will be. This applies to all lenses of all brands, obviously APO lenses are less affected . For this reason the better postprocessing programs will have correction for both lateral (red-green fringing) and longitudinal (purple-blue) aberration. Quote Link to post Share on other sites More sharing options...
Slender Posted February 26, 2021 Share #10 Posted February 26, 2021 This has never been an issue with my SL2 and 24-90.... very surprised to read such a comment, it is the first time. Quote Link to post Share on other sites More sharing options...
Photoworks Posted February 26, 2021 Share #11 Posted February 26, 2021 Nonsense, the 24-90 does not have a CA problem. I was on a shoot with a client and he kept asking to get some flare in while making backlight portrait for a movie. The lens is so well corrected that is was very hard to get any flare! 1 Quote Link to post Share on other sites More sharing options...
helged Posted February 27, 2021 Share #12 Posted February 27, 2021 Very strange. I have used SL24-90 since SL was introduced, and later on SL2 since it was introduced, and chromatic aberration has never, ever been a problem. 1 Quote Link to post Share on other sites More sharing options...
Joakim Posted February 27, 2021 Share #13 Posted February 27, 2021 This is a discussion based on hearsay, some sample images or other more solid references would be good 1 Quote Link to post Share on other sites More sharing options...
Chun Wah LAM Posted February 28, 2021 Share #14 Posted February 28, 2021 Being an amateur, can someone enlighten me what’s wrong with the colour at circled areas. Shot with SL2-S + APO SL 35mm f4.5, 1/1000 sec, AWB, ISO 100. Thanks. 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/318369-cromatic-aberration/?do=findComment&comment=4150323'>More sharing options...
Patrickxyz Posted February 28, 2021 Share #15 Posted February 28, 2021 vor 3 Minuten schrieb Chun Wah LAM: Being an amateur, can someone enlighten me what’s wrong with the colour at circled areas. Shot with SL2-S + APO SL 35mm f4.5, 1/1000 sec, AWB, ISO 100. Thanks. 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! Looks like moire to me. Quote Link to post Share on other sites More sharing options...
Chun Wah LAM Posted February 28, 2021 Share #16 Posted February 28, 2021 Thank you. I thought APO is invincible. Quote Link to post Share on other sites More sharing options...
farnz Posted February 28, 2021 Share #17 Posted February 28, 2021 30 minutes ago, Chun Wah LAM said: Thank you. I thought APO is invincible. Moiré's not caused by a failing in your lens, it's caused by the absence of an Anti-Aliasing (AA) filter that's absent because Leica's aim is to maximise resolution so it's a trade-off. Either don't add an AA filter over the sensor and capture maximum detail with occasional Moiré or add an AA filter to never get Moiré and sacrifice detail in every picture taken. Aliasing occurs when there are tight, repeating patterns in the object, the sensor's resolution is similar to the pitch of the pattern and the sensor can't quite decide whether the pixel (sensel) should be red or green and it figuratively flips a coin. As the pattern in the object repeats the coin flipping does too the red/green Moiré pattern results. Moiré's easily fixed in most raw conversion software. Pete. 3 2 Quote Link to post Share on other sites More sharing options...
LD_50 Posted February 28, 2021 Share #18 Posted February 28, 2021 1 hour ago, farnz said: Moiré's not caused by a failing in your lens, it's caused by the absence of an Anti-Aliasing (AA) filter that's absent because Leica's aim is to maximise resolution so it's a trade-off. Either don't add an AA filter over the sensor and capture maximum detail with occasional Moiré or add an AA filter to never get Moiré and sacrifice detail in every picture taken. Aliasing occurs when there are tight, repeating patterns in the object, the sensor's resolution is similar to the pitch of the pattern and the sensor can't quite decide whether the pixel (sensel) should be red or green and it figuratively flips a coin. As the pattern in the object repeats the coin flipping does too the red/green Moiré pattern results. Moiré's easily fixed in most raw conversion software. Pete. Moire is also eliminated as resolution increases. An SL2 may not exhibit moire in the same photo. 1 Quote Link to post Share on other sites More sharing options...
beewee Posted February 28, 2021 Share #19 Posted February 28, 2021 (edited) 3 hours ago, Chun Wah LAM said: Thank you. I thought APO is invincible. Actually, if you have a less sharp lens, it would “fix” the problem 🤣 The problem is that your lens out resolves the sensor and there is high frequency content in the image that is higher than what the sensor can capture so you get moire which is a photographic term for aliasing. An anti-aliasing filter is what is normally put in front of the sensor to prevent such problem but that basically just blurs the image before it hits the sensor. Lightroom does have the ability to get rid of moire. Edited February 28, 2021 by beewee Quote Link to post Share on other sites More sharing options...
Chun Wah LAM Posted February 28, 2021 Share #20 Posted February 28, 2021 Thank you all for the detail explanations. Indeed, when I use the Lumix 20-60mm 3.5-5.6 L mount, the problem is only minimal. Thanks again. Quote Link to post Share on other sites More sharing options...
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