p.4 #4 · Official: Voigtlander 50mm f/2 APO VM mount
rscheffler wrote:
Glad to see the round aperture opening at f/2.8 and f/5.6 is retained like in the Sony version.
Size is also very similar to the 50 Lux ASPH I currently use, which is welcome. I was concerned it might be a bit on the long side.
Sony version has round aperture only at f2 and f2.8 but the new VM version's aperture system seems to have been re-designed further to have circular aperture also at f5.6.
Dec 08, 2020 at 02:09 AM
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p.4 #5 · Official: Voigtlander 50mm f/2 APO VM mount
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.
Much better, IMO, seems like an exaggeration. We are talking about 3 percent higher contrast at 30 and 40 cycles/mm. That small of a difference is going to be pretty hard to see even blown up to 100% magnification with a 40MP sensor, and that is just wide open performance. The MTF graph for this M mount version is still quite phenomenal.
And while we are talking about specs they got the lens to be a bit lighter and physically smaller than I expected. It is only a tiny bit larger than the Leica M 50 f/2 APO and quite competitive in size.
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p.4 #6 · Official: Voigtlander 50mm f/2 APO VM mount
Juha Kannisto wrote:
Sony version has round aperture only at f2 and f2.8 but the new VM version's aperture system seems to have been re-designed further to have circular aperture also at f5.6.
p.4 #7 · Official: Voigtlander 50mm f/2 APO VM mount
It needs f/5.6 to achieve what the Sony version does at f/2.8. A nice consolation factor to the Leica and other users.
Juha Kannisto wrote:
Sony version has round aperture only at f2 and f2.8 but the new VM version's aperture system seems to have been re-designed further to have circular aperture also at f5.6.
p.4 #8 · Official: Voigtlander 50mm f/2 APO VM mount
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.
realVivek wrote:
It needs f/5.6 to achieve what the Sony version does at f/2.8. A nice consolation factor to the Leica and other users.
p.4 #9 · Official: Voigtlander 50mm f/2 APO VM mount
rscheffler wrote:
Does anyone know if the Leica 50 Cron APO ASPH can be set manually in any of the digital M camera menus? Given it's a recent lens that has only been available as 6-bit coded, I doubt it's in any of the menus. It's not a manually set lens code menu option in my M240.
The M10 doesn’t have the 50 APO listed in the menu but the SL2 has it, interestingly the M10 also lacks the 50 Summarit while the SL2 has both the 2.4 and 2.5 version listed. Some kind of memory optimization in the M10 perhaps?
p.4 #11 · Official: Voigtlander 50mm f/2 APO VM mount
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.
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.
p.4 #12 · Official: Voigtlander 50mm f/2 APO VM mount
I am sure there will be comparisons available soon to clear that doubt.
AFAIC, I am more than happy with my E mount version and Leica (and other mirrorless) users should be happy that there will be an affordable APO 50/2 (albeit without the stripes).
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p.4 #15 · Official: Voigtlander 50mm f/2 APO VM mount
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.
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.
p.4 #18 · Official: Voigtlander 50mm f/2 APO VM mount
joakim wrote:
The M10 doesn’t have the 50 APO listed in the menu but the SL2 has it, interestingly the M10 also lacks the 50 Summarit while the SL2 has both the 2.4 and 2.5 version listed. Some kind of memory optimization in the M10 perhaps?
Yes, there is also no 0.95 Noct in M10 but SL2 has it if you use OEM M to L adapter.
This is a great addition. circular bokeh at f2.8 and 5.6 is a selling point for me. Sharpness is not a concern at all especially for rangefinder use. APO M is my favorite in term of handling. Other than that, I don't see much point choose it over this one unless you just want something within Leica for M system. (I am)
p.4 #19 · Official: Voigtlander 50mm f/2 APO VM mount
Yes 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.
p.4 #20 · Official: Voigtlander 50mm f/2 APO VM mount
Here are both MTF graphs for comparison: E mount and VM mount:
Very similar at f/4 but wide open, the E-mount performs slightly better at center while the VM seems to have a more consistent performance across the field. Perhaps we will see a tad more astigmatism and/or lateral CA on the VM mount as well. (sag and merid lines more separated)
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