The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Schneider PC-TS 2.8/50 and the Pentax 40mm F2.8 XS Lens 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. Schneider PC-TS 2.8/50 is the longer of the two lenses at 128mm. The Pentax 40mm F2.8 XS Lens with a length of 9mm, is 119mm shorter. Besides being longer, the Schneider PC-TS 2.8/50 also has a larger diameter of 108mm compared to the Pentax 40mm F2.8 XS Lens's 63mm diameter.
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. Pentax 40mm F2.8 XS Lens weighs 45g, 96% (1355g) lighter than the Schneider PC-TS 2.8/50's weight of 1400g.
Lens Mounts
Both the Schneider PC-TS 2.8/50 and the Pentax 40mm F2.8 XS Lens has the same Pentax KAF lens mount. Some of the latest released cameras that are compatible with the Pentax KAF lenses are Pentax K-3 III Monochrome, Pentax KF and Pentax K-3 III.
Schneider PC-TS 2.8/50 is also available in Canon EF , Nikon F (FX) and Sony Alpha mounts.
Focal Range
Schneider PC-TS 2.8/50 is a prime lens with fixed focal lenght of 50mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
75mm.
On the other hand, the Pentax 40mm F2.8 XS Lens is a prime lens with fixed focal lenght of 40mm which has an effective (full-frame 35mm equivalent) focal range of 60mm when used on a APS-C / DX format camera.