naturephoto1 wrote: rscheffler wrote:
Rich, another factor could be the adapter. If my understanding is correct, slight adapter misalignment will be more critical at infinity compared to closer distances. If the test was on a Leica M, I'd be more suspicious about the lens. As it is now, there are a few variables that are difficult to rule out, the adapter being one. Sensor stack thickness is another that is more critical at infinity, but from what Fred indicated, he didn't see differences between Leica M, Kolari modded and stock Sony.
If you're not going to send the lens back tomorrow, then take it with you and just use it as you normally would. Don't go out of your way to do a formal infinity test again. Look at your real-world results and go from there.
BTW, I agree the crops above look better than your outdoor crops. But it's also a 2D subject vs. real-world 3D landscape. It could be, as has been suggested, that the lens performs better at nearer distances. Maybe it's optimized for portraits?
Fred, have you made any portraits with it, or tested it a nearer distances?
Hi Ron,
Thanks for the additional input. The adapter that I was using was my first Novoflex Leica M to NEX adapter. They are known for their accuracy in machining but... I have never noticed a problem with either of my Novoflex adapters with my other M-mount lenses, but I could have missed it. I could also try switching to my second Novoflex Leica M to NEX adapter that my Voigtlander 28mm f2 Ultron II VM is mounted on.
I can also opt to use the lens on my A7rII Kolari Vision UT Sensor modified camera. But, I was trying to see if it would hold up to the 50 mp camera sensor.
If you really think that I should send the lens back I will. But, there is no guarantee whatever I get in exchange would be any better.
If we do find that there is a slight softness on the right side, I suppose that I could also try to favor that side for focus. But, I am not sure if there would be any benefit. My shots close up have really been strong particularly when stopped down a little, but I have not really tried to have focus to the corners.
At this point, I am not sure what to do.
Rich
Rich if there is some slight decentering, I don't think it is going to affect pictures in the real world. Many if not most lenses are slightly decentered. Personally minor decentering is not a problem for me and how I shoot. For stopped down shooting Ithe extra depth of field will cover the centering issues if they are minor. For wide open shooting I almost never care about the corners and have them in focus. To me there are so many other things I care so much more about that any minor decentering like you might have here is just not worth being concerned about, IMO.
naturephoto1 wrote: rscheffler wrote:
Rich, another factor could be the adapter. If my understanding is correct, slight adapter misalignment will be more critical at infinity compared to closer distances. If the test was on a Leica M, I'd be more suspicious about the lens. As it is now, there are a few variables that are difficult to rule out, the adapter being one. Sensor stack thickness is another that is more critical at infinity, but from what Fred indicated, he didn't see differences between Leica M, Kolari modded and stock Sony.
If you're not going to send the lens back tomorrow, then take it with you and just use it as you normally would. Don't go out of your way to do a formal infinity test again. Look at your real-world results and go from there.
BTW, I agree the crops above look better than your outdoor crops. But it's also a 2D subject vs. real-world 3D landscape. It could be, as has been suggested, that the lens performs better at nearer distances. Maybe it's optimized for portraits?
Fred, have you made any portraits with it, or tested it a nearer distances?
Hi Ron,
Thanks for the additional input. The adapter that I was using was my first Novoflex Leica M to NEX adapter. They are known for their accuracy in machining but... I have never noticed a problem with either of my Novoflex adapters with my other M-mount lenses, but I could have missed it. I could also try switching to my second Novoflex Leica M to NEX adapter that my Voigtlander 28mm f2 Ultron II VM is mounted on.
I can also opt to use the lens on my A7rII Kolari Vision UT Sensor modified camera. But, I was trying to see if it would hold up to the 50 mp camera sensor.
If you really think that I should send the lens back I will. But, there is no guarantee whatever I get in exchange would be any better.
If we do find that there is a slight softness on the right side, I suppose that I could also try to favor that side for focus. But, I am not sure if there would be any benefit. My shots close up have really been strong particularly when stopped down a little, but I have not really tried to have focus to the corners.
At this point, I am not sure what to do.
Rich
Rich if there is some slight decentering, I don't think it is going to affect pictures in the real world. Many if not most lenses are slightly decentered. Personally minor decentering is not a problem for me and how I shoot. For stopped down shooting I am almost certainly going to stop down a bit which will cover the centering issues. For wide open shooting I almost never care about the corners and have them in focus. To me there are so many other things I care so much about that any minor decentering like you might have here is just not worth being concerned about, IMO.
Dec 31, 2021 at 11:21 AM
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