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 p.991 #13 · Leica M/X/T/S/Q/CL/SL Picture Thread | |
rscheffler wrote:
Joakim - love the lines! Berlin Hbf is a photographer's delight, well, at least it would be for me, with how the lines and light interact. It's fascinating both above ground and below ground.
Yes, it would seem uncoded would be the 'purer' route to the M9 & 28 Cron experience. The question for me, however, is whether I'm willing to give up the convenience of EXIF data. As well, I don't want to start fiddling with turning coding off and on because I'll forget to turn it back on for other lenses (been there, done that, too often). An alternative would be to alter or mask the lens's 6-bit coding to force a detection error and therefore no application of lens correction.
Referring specifically to the M240:
Since the camera doesn't know the physical aperture setting, I'm not sure Leica can make the profile reliably correct for specific aperture values. Maybe it does using the ambient light sensor and guessing? Otherwise, the profile correction would have to be a compromise so that it's effective with stopped down settings, like f/8 or 11 that require less correction, but still be sufficient for wide open. IIRC, lens code strength varied on the M9 based on ISO due to significantly increased noise at higher ISOs. On all apertures tested, the coded setting resulted in somewhat lower highlight values compared to uncoded. The difference was less at higher aperture values, but still there.
There is probably also a general difference in color response/bias between the M9 and M240 that affects images in general, and may be more noticeable when combined with the 28 Cron's particular characteristics. For landscape images, I'm particularly struck by how much deeper the blue sky is with the M9 vs. the M240. Greens are also richer in the M9. The lens's vignetting characteristics combined with the M9's profiling results in a more dramatic rendering. Of course tweaks in post can minimize the difference, but one area that is difficult is the difference in tonality along the lower half of the image, seen as a deepening/flattening of tones in M240 images. You can see it in the samples below - how the foreground grass appears more muted compared to the M9 versions.
Here are a couple examples (details in watermark), chosen in the hopes of bringing out the E6 'chrome' qualities of the M9 with the 28 Cron:
Here is the M240 file tweaked to approximate the stock M9 file above:
And another scene:
Other than trying to get WB in the ballpark, these DNGs were converted with default LR settings and therefore no tweaks of contrast, saturation, etc.
Oh, also discount the extreme edge vignetting as this was done with a non-Leica hood that after testing today, I can confirm does increase vignetting at wider apertures. But since it was on the lens for both cameras, that aspect is at least consistent......Show more →
Ron very much appreciate your comparison efforts with 28cron, which are very interesting. I think as far as coding, vignetting, and color shift are concerned, your work has nailed down some issues--esp the lowered highlights on the M240.
What I really can't tell is what differences there are, if any, in handling fine details at the center, edges and corners. Those aspects interest me both in classic f/8 landscape mode with far details across the frame and in the lower corners, and also mid and close range at faster apertures. I suspect there are bokeh differences too---  but I know you have a real life, so thanks so much for what you've done so far. 
Charles also reports the Cron is pretty decent on A7s afterall----I found it OK on A7.
took a 2 hr mtn bike ride today with my "ultralight" setup: M9 + 40 cron (m-rokkor version 1)
L1020129-4 by unoh7, 40 cron f/6.7
My loop curls back under those high cliffs
Gasping for air
L1020143 by unoh7, 40/2 @f/2
L1020147-2 by unoh7, 40cron f/2.4
L1020145 by unoh7, 40cron f/6.7
I like the little 40/2 but on the M9 edges and centers show some big differences--which are easy to spot at infinity with trees and leaves
L1020156-3 by unoh7 40cron f/16
@Gary love the shots from Hungary!
@Joakim 24 lux station shots awesome!!
@Edward always very much enjoy your shots on the street. Cop in front of blonde billboard is wonderful!
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