The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Pentax 50mm F1.8 and the Schneider PC-TS 2.8/50 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 50mm F1.8 with a length of 39mm, is 89mm shorter. Besides being longer, the Schneider PC-TS 2.8/50 also has a larger diameter of 108mm compared to the Pentax 50mm F1.8'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 50mm F1.8 weighs 122g, which means it is 1278g (91%) lighter than the Schneider PC-TS 2.8/50 which has a weight of 1400g.
Filter Threads
The Pentax 50mm F1.8 has a filter size of 52mm whereas the Schneider PC-TS 2.8/50 has a 95mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 52mm filters that we recommend you to consider for the Pentax 50mm F1.8:
And these are the 95mm filters that we recommend for the Schneider PC-TS 2.8/50:
Lens Mounts
Both the Pentax 50mm F1.8 and the Schneider PC-TS 2.8/50 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
Both lenses have the same focal range of
50mm but while Pentax 50mm F1.8 has the fastest aperture of
F1.8, the Schneider PC-TS 2.8/50's widest aperture value is
F2.8.