The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Voigtlander 58mm F1.4 SL II and the Pentax DA 55mm F1.4 SDM for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Pentax DA 55mm F1.4 SDM is the longer of the two lenses at 66mm. The Voigtlander 58mm F1.4 SL II with a length of 48mm is 18mm shorter. Besides being longer, the Pentax DA 55mm F1.4 SDM also has a larger diameter of 70mm compared to Voigtlander 58mm F1.4 SL II's 64mm diameter.
Weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Voigtlander 58mm F1.4 SL II weighs 320g, which means it is 55g (14%) lighter than the Pentax DA 55mm F1.4 SDM which has a weight of 375g.
Both Voigtlander 58mm F1.4 SL II has the Pentax KAF lens mount whereas the Pentax DA 55mm F1.4 SDM has the Pentax KAF3 lens mount. Some of the latest released cameras that are compatible with these mounts are Pentax KF, Pentax K-3 III and Pentax K-1 II for the Pentax KAF Mount and , and for the Pentax KAF3 Mount.
Voigtlander 58mm F1.4 SL II is also available in Nikon F (FX) mount.
Voigtlander 58mm F1.4 SL II is a prime lens with fixed focal lenght of 58mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 87mm.
Pentax DA 55mm F1.4 SDM is a prime lens with fixed focal lenght of 55mm which has a 35mm equivalent focal range of 87mm when used on a APS-C / DX format camera.