12-09-2010, 02:53 PM
(This post was last modified: 12-09-2010, 03:14 PM by Brightcolours.)
[quote name='joachim' timestamp='1291905526' post='4905']
I doubt the optical design differs between the two. Rangefinder 90mm lenses have a lot of clearance between the last piece of glass and the sensor/film. You can easily fit a mirror in there.
On the other hand, I don't see any disagreement between the two tests. The numbers are actually very close. It might be that the 10MP of the Nikon D200 coincides with the MTF50 of that lens, and the higher resolution of the NEX outresolves that lens.
[/quote]
Nice that you doubt that, however a simple look at the lenses in both reviews already will show that both lenses are of a slightly different design. One only has to look at the difference in how they extend during focussing.
![[Image: lens.jpg]](http://www.opticallimits.com/images/8Reviews/lenses/voigtlander_90_35_nex/lens.jpg)
![[Image: lens.jpg]](http://www.opticallimits.com/images/8Reviews/lenses/voigtlander_lanthar_90_35_nikon/lens.jpg)
The basic design may be the same, but they are different in detail. Also notice the reversal of focus and aperture ring between the two designs.
SL (II): 0.5m MFD
M-mount: 1m MFD
(showing the basic design to be the same
![[Image: Voigtländer-Apo-Lanthar-90mm-F3.5-SL-II.jpg]](http://nikonrumors.com/wp-content/uploads/2010/02/Voigtländer-Apo-Lanthar-90mm-F3.5-SL-II.jpg)
![[Image: 90mmApoLantharSchwarz_small.jpg]](http://www.voigtlaender.de/cms/voigtlaender/voigtlaender_cms.nsf/gfx/90mmApoLantharSchwarz_small.jpg/$file/90mmApoLantharSchwarz_small.jpg)
![[Image: 90mm.gif]](http://www.voigtlaender.de/cms/voigtlaender/voigtlaender_cms.nsf/gfx/90mm.gif/$file/90mm.gif)
I doubt the optical design differs between the two. Rangefinder 90mm lenses have a lot of clearance between the last piece of glass and the sensor/film. You can easily fit a mirror in there.
On the other hand, I don't see any disagreement between the two tests. The numbers are actually very close. It might be that the 10MP of the Nikon D200 coincides with the MTF50 of that lens, and the higher resolution of the NEX outresolves that lens.
[/quote]
Nice that you doubt that, however a simple look at the lenses in both reviews already will show that both lenses are of a slightly different design. One only has to look at the difference in how they extend during focussing.
The basic design may be the same, but they are different in detail. Also notice the reversal of focus and aperture ring between the two designs.
SL (II): 0.5m MFD
M-mount: 1m MFD
(showing the basic design to be the same