Peire wrote:
Samuli,
It seems that the Biogon G 28/2.8 performs much better on the A7m,compared to A7/R.Is it like this or just an illusion?
I would say so, based on 1hour 50min shooting experience on crappy fading overcast light... G28 was pretty much impossible lens with standard A7 and A7r, I did use it for close-ups @ f/11, where it was not all bad. Now with A7m I think it will be one of the most used lens during summer 2016. For focusing distances < 1.5 meters it's looks really good, and I really like it's focus plane rendering style and boke/DOF transitions. However I would not use it for landscapes, even with 0.8mm sensor cover glass there seems to be some field curvature.
I have not yet tested, but I hope that Kolari-mod restored Contax/Yashica mount Distagon T* 2.8/28 rendering to same level it was with Canon 5DmkII (or better). If that happens, then the C/Y mount 28mm will be my 28mm landscape lens for summer 2016 - it definitely is not as sharp as Leica Elmarit-R 28mm f/2.8 v2, but Leica's rendering style is nothing exiting even it's "mathematically" very good lens.
sebboh wrote:
samuli – that looks very promising for the g28. how much improvement is there in field curvature?
It varies a lot by shooting distance, like commented to Peire; I would not use this lens, even with Kolari mod, for landscapes.
Looking MTF, I would not expect much wide open, but based on RAW-samples (links below) it's clear that f/5.6 performance is not on same level as measured MTF indicates. On closer distances it's very clear that this lens has very good boke closed down like MTF indicates (sagittal and tangential lines do not diverse from each another).
3 Shots from Whitby, North Yorkshire
All with A7r + Canon 16-35, shot in different ways to get around perspective distortion/converging verticals
1 - Shot with camera leveled and then top 1/3 of image cropped out
2 - Camera tilted down to get more of the steps in the shot and then used 'vertical transform' in LR
3 - Pano of 3 shots in vertical orientation, combined in LR
Ronny Olsson wrote:
Thanks Bob .. it's a hoverfly ..sometimes hoverflys stand still in the air and then you have to shoot
"hoverflys stand still in the air"
Well yes, true, but not for very long in my experience. A maximum of about 1 second and if you so much as make eye contact they are off. So I am still convinced Ronny is using some special powers of one sort or another!
Charlie N: This is silly, but I kind of wish you posted the pier images with Ghost Pier in between the other two. That would make them flow nicely on the screen. My favourite of the set is Ghost Pier, it has nice b&w tones.
Can anyone guess what lens was used for these (without checking flickr)? Some hints: 1950s, Leica thread mount, and 35mm. This lens was one of several I inherited from my grandfather, who was a professional portrait photographer in Oil City, Pennsylvania for many many years. These are great with film, but I was excited to see them on digital. Over all I'm pretty impressed they hold up so well even at 42 megapixels.
