The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Venus 105mm F2 and the Samsung D-Xenon 50-200 F4-5.6 ED 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. Venus 105mm F2 is the longer of the two lenses at 99mm. The Samsung D-Xenon 50-200 F4-5.6 ED with a length of 79mm, is 20mm shorter. Besides being longer, the Venus 105mm F2 also has a larger diameter of 76mm compared to the Samsung D-Xenon 50-200 F4-5.6 ED's 67mm 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. Samsung D-Xenon 50-200 F4-5.6 ED weighs 255g, 65% (490g) lighter than the Venus 105mm F2's weight of 745g.
Filter Threads
The Venus 105mm F2 has a filter size of 67mm whereas the Samsung D-Xenon 50-200 F4-5.6 ED 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 67mm filters that we recommend you to consider for the Venus 105mm F2:
And these are the 52mm filters that we recommend for the Samsung D-Xenon 50-200 F4-5.6 ED:
Lens Mounts
Both the Venus 105mm F2 and the Samsung D-Xenon 50-200 F4-5.6 ED has the same Pentax KAF2 lens mount. Some of the latest released cameras that are compatible with the Pentax KAF2 lenses are Pentax K-3 III Mono, Pentax KF and Pentax K-3 III.
Venus 105mm F2 is also available in the Sony E , Canon EF, Nikon F (FX) and Sony Alpha mounts.
Focal Range
Venus 105mm F2 is a prime lens with fixed focal lenght of 105mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
157.5mm.
On the other hand, the Samsung D-Xenon 50-200 F4-5.6 ED has a focal range of 50-200mm and 4.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 75-300mm when used on a APS-C / DX format camera.
