Here are some test shots between the Voigtlander APO-Lanthar 28mm f/2, Sigma 28-45mm f/1.8 DG DN, and Zeiss Loxia 25mm f/2.4. I realize the Loxia is wider than 28, but someone was interested in a comparison in the CV 28 APO thread.
It was breezy, so branches were moving. Nothing extremely scientific as a result. All taken with my a7R V and processed in Lightroom. I tried to balance color temps and exposure. Took default sharpening. I left distortion correction on for the Sigma and Zeiss, but turned off vignetting correction. (There is no profile for the CV yet.)
Great test Tim! Wow. All three look really good (as they should!). I see that the zoom has slightly more blur than the APO. It would be hard for me to choose a favorite, but if pressed, I like the APO slightly more.
mudlake wrote:
Great test Tim! Wow. All three look really good (as they should!). I see that the zoom has slightly more blur than the APO. It would be hard for me to choose a favorite, but if pressed, I like the APO slightly more.
Thanks, I also shot the Simera, but at wide apertures it seems much much softer. Even focusing it was tough, couldn't get much peaking to show. Makes me think I have a duff copy, so I left it out of the posts.
j4nu wrote:
Thanks, this is an interesting comparison.
Is the difference in distortion visible with profiles turned off between the lenses?
So you mean if I were to turn off distortion correction on the Sigma and Zeiss, how different would they be from each other (including the CV which I don't have a profile for)?
I can process a version with distortion off for the Sigma and Zeiss...and post those. Any particular shot? I assume if I do the f/2.4 and f/2.5 aperture so I can include the Zeiss, that would be okay?
Let me know. I mean visually I think the Zeiss has a bit less distortion than the Sigma, but the Sigma isn't crazy in terms of needing correction.
This set is similar to the above, but I also did not correct for distortion (vignetting was already off) for the Sigma and Zeiss. You'll notice the Sigma has more distortion than the Zeiss.
Same for this set, not only is vignetting correction off, but so is distortion. All of the CV shots I've posted aren't corrected for vignetting and distortion, since there is no Lightroom profile yet.
tsdevine wrote:
Thanks, I also shot the Simera, but at wide apertures it seems much much softer. Even focusing it was tough, couldn't get much peaking to show. Makes me think I have a duff copy, so I left it out of the posts.
That 28mm Simera should be very sharp at f2 at that distance (looks like about 2 meters). At two meters mine is pretty sharp at f1.4. I hope you don’t have a bad copy!
mudlake wrote:
That 28mm Simera should be very sharp at f2 at that distance (looks like about 2 meters). At two meters mine is pretty sharp at f1.4. I hope you don’t have a bad copy!
Well, I must have a bad copy....there is a huge difference between it and the other lenses. Shame on me for not testing it at wider apertures when I got it. Stopped down it seemed "reasonable" based on what I had seen from other posts. C'est la vie, it happens.
tsdevine wrote:
Well, I must have a bad copy....there is a huge difference between it and the other lenses. Shame on me for not testing it at wider apertures when I got it. Stopped down it seemed "reasonable" based on what I had seen from other posts. C'est la vie, it happens.
With my simera 28 wide-open, I'm looking through the viewfinder and I'm like, this is tough to focus. I put on my nokton for a comparison test and bam "this is SO much easier to focus" but then I look at the results and it's not a huge difference, not sure what's goin on. Maybe the contrast when you're that zoomed in makes the difference with focussing. Not sure. Zooming in on the images centrally on mine, there's a decent jump between 1.4 and 2. I don't know if it's visible in the viewfinder.
Actually someone mentioned this with the viewfinder when adapted to fuji apsc and I found it similar. End results looked decent though.
Yogifi wrote:
With my simera 28 wide-open, I'm looking through the viewfinder and I'm like, this is tough to focus. I put on my nokton for a comparison test and bam "this is SO much easier to focus" but then I look at the results and it's not a huge difference, not sure what's goin on. Maybe the contrast when you're that zoomed in makes the difference with focussing. Not sure. Zooming in on the images centrally on mine, there's a decent jump between 1.4 and 2. I don't know if it's visible in the viewfinder.
Actually someone mentioned this with the viewfinder when adapted to fuji apsc and I found it similar. End results looked decent though....Show more →
Here is the second scene, shot with the Simera at f/2 and f/2.5. Focus was on the right most statue's right eye for all of the shots in this scene.
Yogifi wrote:
I'm not sure tbh, most of mine at f1.4-f2 were central.
... I wouldn't rule it out.
I can try a similar shot at f2 focussed there at that midzone, at roughly that distance and get back to you.
Both my shots were focused on a subject way off center, the little girl's eye in the first set and then the statue on the right. And I focused as framed, not a center focus and recompose. (Since I wanted to maintain the composition across all the lenses.)
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