The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Voigtlander 75mm f1.5 VM and the Voigtlander 90mm F3.5 SL II for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Voigtlander 75mm f1.5 VM is the longer of the two lenses at 63mm. The Voigtlander 90mm F3.5 SL II with a length of 52mm, is 11mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 63mm.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Voigtlander 90mm F3.5 SL II weighs 320g, 8% (30g) lighter than the Voigtlander 75mm f1.5 VM's weight of 350g.
Filter Threads
The Voigtlander 75mm f1.5 VM has a filter size of 58mm whereas the Voigtlander 90mm F3.5 SL II has a 52mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 58mm filters that we recommend you to consider for the Voigtlander 75mm f1.5 VM:
And these are the 52mm filters that we recommend for the Voigtlander 90mm F3.5 SL II:
Lens Mounts
The Voigtlander 75mm f1.5 VM has the Leica M lens mount whereas the Voigtlander 90mm F3.5 SL II has the Pentax KAF lens mount. Some of the latest released cameras that are compatible with these mounts are Pixii+, Epson R-D1x and Epson R-D1 for the Leica M Mount and Pentax K-3 III Mono, Pentax KF and Pentax K-3 III for the Pentax KAF Mount.
Voigtlander 90mm F3.5 SL II is also available in Canon EF and Nikon F (FX) mounts.
Focal Range
Voigtlander 75mm f1.5 VM is a prime lens with fixed focal lenght of 75mm which has an effective (full-frame 35mm equivalent) focal range of
112.5mm when used on a 35mm FF format camera.
On the other hand, the Voigtlander 90mm F3.5 SL II is a prime lens with fixed focal lenght of 90mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 135mm.
