Re: Voigtlander 50mm f/2 APO VM M-mount coming soon!
Well, the 50AA will be a touch smaller and has the nicer Leica ergonomics, plus 6-bit coding. All very small differences, but that can be more pronounced in use. That said, for what likely will be a $5K+ price difference, I think I'll be getting the Voigtlander at some point instead of the Leica.
realVivek wrote:
In addition, the wide open performance of the Sony FE lens is much better than the M mount one (based on their MTF charts).
It does tighten up when stopped down.
AcuteShadows wrote:
Often, MTF charts do not take sensor thickness into consideration. So the real performance of these lenses with their respective sensors might be quite different from each other, and I'm not sure which one would be better in combination with the sensor it was built for.
We'll have to wait for Fred to do a comparison (hint, hint ).
From the Cosina MTFs, it would seem the FE version's sagittal and tangential lines are closer wide open, which might mean the M version's rendering is slight less smooth. But I think it will be sharp enough wide open and for how I would use it, would likely be stopped down a bit anyway most of the time. At which point, based on the MTFs, it looks like both versions are very similar.
In any case, it seems there are some tradeoffs between the two versions. Perhaps the FE is a slightly better optical performer. But IMO the M version looks nicer and I appreciate the additional round aperture at f/5.6 because...
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Juha Kannisto wrote:
Personally I prefer to have nice sunstars at stopped down apertures so not missing having a circular aperture at f5.6 with my E-mount version I guess the lighter weight is the main benefit with the VM version.
Steve Spencer wrote:
I mostly agree with you but if it has nice sunstars at f/8 (we will have to see if that happens), then I won't mind having the round aperture shape at f/5.6. The round aperture at f/5.6 might come in handy sometimes and it would rarely be a problem stopping down to f/8 when I want sunstars.
I agree with Steve and I'm one who actually does not like the super-pronounced sunstars typical in many Cosina designs, therefore I'm very glad that f/5.6 gives a stopped down option to reduce or completely eliminate them.
I haven't followed the specs of the FE version super closely and missed that it only had the round aperture shape at wide open and f/2.8. I'll take this adjustment/improvement to the M version's aperture design in exchange for the 'worse' wide open MTF performance.
Re: Voigtlander 50mm f/2 APO VM M-mount coming soon!
realVivek wrote:
In addition, the wide open performance of the Sony FE lens is much better than the M mount one (based on their MTF charts).
It does tighten up when stopped down.
AcuteShadows wrote:
Often, MTF charts do not take sensor thickness into consideration. So the real performance of these lenses with their respective sensors might be quite different from each other, and I'm not sure which one would be better in combination with the sensor it was built for.
We'll have to wait for Fred to do a comparison (hint, hint ).
From the Cosina MTFs, it would seem the FE version's sagittal and tangential lines are closer wide open, which might mean the M version's rendering is slight less smooth. But I think it will be sharp enough wide open and for how I would use it, would likely be stopped down a bit anyway most of the time. At which point, based on the MTFs, it looks like both versions are very similar.
In any case, it seems there are some tradeoffs between the two versions. Perhaps the FE is a slightly better optical performer. But IMO the M version looks nicer and I appreciate the additional round aperture at f/5.6 because...
---------------------------------------------
Juha Kannisto wrote:
Personally I prefer to have nice sunstars at stopped down apertures so not missing having a circular aperture at f5.6 with my E-mount version I guess the lighter weight is the main benefit with the VM version.
Steve Spencer wrote:
I mostly agree with you but if it has nice sunstars at f/8 (we will have to see if that happens), then I won't mind having the round aperture shape at f/5.6. The round aperture at f/5.6 might come in handy sometimes and it would rarely be a problem stopping down to f/8 when I want sunstars.
I agree with Steve and I'm one who actually does not like the super-pronounced sunstars typical in many Cosina designs, therefore I'm very glad that f/5.6 gives a stopped down option to reduce or completely eliminate them.
I haven't followed the specs of the FE version super closely and missed that it only had the round aperture shape at wide open and f/2.8. I'll take this adjustment/improvement to the M version's aperture design in exchange for the 'worse' wide open MTF performance.
Dec 08, 2020 at 11:58 AM
Previous versions of rscheffler's message #15427779 « Official: Voigtlander 50mm f/2 APO VM mount »
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