Hi, I'm asking this question of fishjump, apologies if I have done this all wrong since I have never posted on this forum before.
I'm curious what you encountered as far as distortion with the P67 45mm lens you have pictured in your post. I bought a P645 35mm lens and a Kipon shift adapter (P645 – EF since at the time the G adapters weren't available). The lens was terrific except from a distortion perspective it was unusable for my architecture and interior work. Shifting anywhere out of the centre of the image circle takes the distortion off centre and therefore makes it impossible to correct in post — there is a way but it's not practical. Not only was the distortion unfixable, but it makes lining up shots very difficult to begin with, especially given that on the GFX (or any camera I have used for that matter) the digital level meter is not 100% accurate.
If anybody else has anything to add please do. I see a lot of people online adapting various MF lenses onto GFX with the various shift adapters but nobody ever mentions distortion. I found one guy that had done a bunch of test shots and made them available to download (Contax 645 35mm, Hasselblad 50mm, P67 45mm, P645 35 & P645 55mm). They were somewhat informative yet the test subject was a room with wonky walls and a partially un-lined timber wall (studs etc. not very plumb): hence it is very hard to tell what is lens distortion and what is just sloppy craftsmanship.
I've settled on a Canon TSE 45mm for the time being, which has a lot less distortion than the Pentax and is actually a pretty decent lens (shows better performance on the GFX than on the Canons, and I have a reconditioned copy which along with my other Canon shift lenses is a lot better than what comes from the factory). It does a reasonable amount of shift but CA is an issue. It isn't exceptional when it comes to flare but neither was the Pentax.
Thanks
Feb 25, 2018 at 12:43 AM
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