After Ricoh's official announcement of the M-mount expansion unit, I decided to buy one, although I had not intended to do so originally. Here are my first personal experiences with the lenses that I bought (or tried to buy). This page is devoted to the Voigtländer Super Wide Heliar 15mm f/4.5 lens.
Note: You can view and download the original files of the samples (for downloading use the browser's context menu).
In preparation of the Ricoh GXR M-mount expansion unit, I bought one lens, a Voigtländer Super Wide Heliar 15mm f/4.5, and auctioned a second one in August 2011, a Leitz Elmar-C 90mm f/4. Both lenses were meant to extend the range of my two Ricoh GXR A12 units at the wide and tele ends.
First, I bought the Voigtländer Super Wide Heliar 15mm f/4.5, which is manufactured by Cosina and equivalent to a 22.5 mm wide angle lens on the GXR. Note that is has an in-built sun shade.
Photos: Voigtländer Super Wide Heliar 15mm f/4.5 (22.5 mm equiv.)
On the M-mount expansion unit, it has an equivalent focal length of 22.5 mm and thus, is a little bit wider than my favorite focal length of 24 mm (which I have learned to prefer over 28 mm).
Photos: Body with A12 M-mount expansion unit attached and Voigtländer Super Wide-Heliar 15mm f/4.5 lens
|Focal length||15 mm (22.5 mm equiv.)|
|Angle of view (35mm film)||110° diagonal|
|Number of iris blades||10|
|Number of lenses/groups||8/6|
|Shortest distance||0.5 m|
|Maximum diameter||59.4 mm|
|Filter thread||52 mm|
Here are a first few samples taken with the Voigtländer Super Wide Heliar 15mm f/4.5 lens (click the images to view the unprocessed original files in a new window):
Disclaimer: I am not a lens expert who sees marked differences between various Leica and/or other lenses. I can check for soft corners, find differences in color rendition, and, in rare cases, may discover a "3D look", but that's all. Please regard therefore my conclusions as the verdict of a "layman".
I have to admit that I use this lens rarely. Manual focusing is not a big issue with this lens because of the huge depth of field. Corner sharpness seems to be OK for such a wide lens.
All in all, the results that the Voigtländer Super Wide Heliar 15 mm f/4.5 mm lens produces on the M-mount unit are very pleasing, but you have to find suitable motives for it...
For more links related to the Ricoh GXR M-mount expansion unit, see page M-Mount Links.