The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 50-200mm F4-5.6 DC OS HSM and the Pentax 50-200mm F4-5.6 ED WR 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. Sigma 50-200mm F4-5.6 DC OS HSM is the longer of the two lenses at 102mm. The Pentax 50-200mm F4-5.6 ED WR with a length of 80mm, is 22mm shorter. Besides being longer, the Sigma 50-200mm F4-5.6 DC OS HSM also has a larger diameter of 74mm compared to the Pentax 50-200mm F4-5.6 ED WR's 69mm 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 50-200mm F4-5.6 ED WR weighs 285g, 32% (135g) lighter than the Sigma 50-200mm F4-5.6 DC OS HSM's weight of 420g.
Filter Threads
The Sigma 50-200mm F4-5.6 DC OS HSM has a filter size of 55mm whereas the Pentax 50-200mm F4-5.6 ED WR 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 55mm filters that we recommend you to consider for the Sigma 50-200mm F4-5.6 DC OS HSM:
And these are the 49mm filters that we recommend for the Pentax 50-200mm F4-5.6 ED WR:
Lens Mounts
The Sigma 50-200mm F4-5.6 DC OS HSM has the Pentax KAF3 lens mount whereas the Pentax 50-200mm F4-5.6 ED WR has the Pentax KAF lens mount. Some of the latest released cameras that are compatible with these mounts are , and for the Pentax KAF3 Mount and Pentax K-3 III Monochrome, Pentax KF and Pentax K-3 III for the Pentax KAF Mount.
Sigma 50-200mm F4-5.6 DC OS HSM is also available in Canon EF , Sony Alpha, Sigma SA and Nikon F (DX) mounts.
Focal Range
Both lenses have the same focal range of
50-200mm and the fastest aperture of
F4.0 - F5.6.