naturephoto1
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 Re: FM Review: Voigtlander 28mm f/2 Ultron II VM | |
genji wrote:
nehemiahphoto wrote:
Fred Miranda wrote:
nehemiahphoto wrote:
LarsHP wrote:
nehemiahphoto wrote:
I was re-reading this thread, and perhaps I missed it, but can anyone link me to some systematic testing between the CV 28v2 and 28 Cron v1 or v2 (tripod, leica sensor stack, etc). I find a lot of video reviews and people with opinions about both lenses, but I would like to see some systematic testing for my own understanding (and honestly too much bias in Leica land for me, despite I own and like some Leica glass).
Especially WO at mid distance—I am sure the CV 28v2 will beat the Crons for resolution across the frame, but I’d like to see if there’s an appreciable difference in rendering the way I’d use a 28/2.
I posted several times in this thread. Check the link below where I have uploaded test shots with the Ultron II and Summicron Asph II.
Not using M camera though, but a Kolari UT modded Nikon Z6. I did a quick comparison with my cron v2 on a M240 and Z6UT, and the difference was that the Z6UT had more vignetting, but less color shift ("Italian flag" issue). Regarding field curvature and corner sharpness etc., I couldn't detect any difference.
https://drive.google.com/drive/folders/1ngYCuU1OzRZVbnbjGtwge1Mx78vuUp8q
Thanks @LarsHP@@@@ and @naturephoto1. as far as I’m concerned, a UTI and native sensor are the same to me effectively. Just what I am hoping for  Curious to hear your thoughts as well @genji@@@@
Why didn't you send your Sony to Kolari instead?
Because the UT (works out to 0.9) is not as thin as the NKIR v3+ (0.75), and while this may not affect many modern RF lenses, other lenses like the Contax G line I believe will do better with thinner while not negatively affecting most current M glass. Additionally, the color management/WB issues seem better on the NKIR versus the Kolari with the UT vs. V3+. On top of that, NKIR told me they are trying out a newer thinner (V5), and that filter is (0.58), so I am hoping for further improvements on those more difficult lenses, so I am hoping that passes into production and I get that (should know soon). Lastly, I can test my NKIR (either V3+ or V5) against Sebboh's Kolari UT as we live near and are friends. The NKIR mod is also cheaper a bit and less of a known quantity, which naturally heightens my interest as well.
What inclines me to go with the NKIR rather than the Kolari conversion was a very long FM post a while ago from a member in Hong Kong (IIRC) which was packed with sample images made with a wide range of lenses on an NKIR converted camera. And the images not only looked great but the member specifically stated that—as nehemiahphoto says—color management/WB issues were minimal.
Hi Jonathan,
White Balance is a piece of cake with the Kolari Vision UT sensor modification providing you make WB standards using a white card and store them in the memory of the camera for different Lighting Conditions. I have them saved in my Kolari Vision UT Sensor Modified and my Kolari Vision V3 Thin Sensor modified A7r for Daylight, Cloudy, and Shade conditions. If you need even more accurate WB adjustments for the conditions, you can photograph the White Card in the series to make your adjustments. Also, when I had Kolari Vision perform the UT sensor modification, Vivek (real Vivek) and I were stunned that the turnaround time for me in February of 2020 (just before the start of the Covid Pandemic) was about 1 week (from arrival at Kolari Vision to the return, but I live in Pennsylvania and Kolari Vision is in New Jersey only about 75 miles or so away). Also, I believe that Vivek has indicated the Kolari Vision UT sensor stack is more rugged (can take more abuse) than the NKIR modification. But, don't quote me on the last comment.
Rich
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