The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samsung D-Xenon 50-200 F4-5.6 ED and the Pentax FA 77mm 1.8 L 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. Samsung D-Xenon 50-200 F4-5.6 ED is the longer of the two lenses at 79mm. The Pentax FA 77mm 1.8 L with a length of 48mm, is 31mm shorter. Besides being longer, the Samsung D-Xenon 50-200 F4-5.6 ED also has a larger diameter of 67mm compared to the Pentax FA 77mm 1.8 L's 64mm 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, which means it is 15g (5%) lighter than the Pentax FA 77mm 1.8 L which has a weight of 270g.
Filter Threads
The Samsung D-Xenon 50-200 F4-5.6 ED has a filter size of 52mm whereas the Pentax FA 77mm 1.8 L has a 49mm 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 Samsung D-Xenon 50-200 F4-5.6 ED:
And these are the 49mm filters that we recommend for the Pentax FA 77mm 1.8 L:
Lens Mounts
The Samsung D-Xenon 50-200 F4-5.6 ED has the Pentax KAF2 lens mount whereas the Pentax FA 77mm 1.8 L has the Pentax KAF lens mount. Some of the latest released cameras that are compatible with these mounts are , and for the Pentax KAF2 Mount and Pentax K-3 III Mono, Pentax KF and Pentax K-3 III for the Pentax KAF Mount.
Focal Range
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.
On the other hand, the Pentax FA 77mm 1.8 L is a prime lens with fixed focal lenght of 77mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 115.5mm.
