The type of photography that you are planning to use is an important decision factor. Here we have evaluated the HD Pentax-FA 35mm F2 AL and the Rokinon 35mm f1.4 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. Rokinon 35mm f1.4 is the longer of the two lenses at 112mm. The HD Pentax-FA 35mm F2 AL with a length of 45mm, is 67mm shorter. On the other hand, the HD Pentax-FA 35mm F2 AL has a larger diameter of 64mm compared to the Rokinon 35mm f1.4'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. HD Pentax-FA 35mm F2 AL weighs 193g, which means it is 467g (70%) lighter than the Rokinon 35mm f1.4 which has a weight of 660g.
Filter Threads
The HD Pentax-FA 35mm F2 AL has a filter size of 49mm whereas the Rokinon 35mm f1.4 has a 77mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 49mm filters that we recommend you to consider for the HD Pentax-FA 35mm F2 AL:
And these are the 77mm filters that we recommend for the Rokinon 35mm f1.4:
Lens Mounts
Both the HD Pentax-FA 35mm F2 AL and the Rokinon 35mm f1.4 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.
Rokinon 35mm f1.4 is also available in Canon EF , Nikon F (FX), Four Thirds, Sony Alpha and Samsung NX mounts.
Focal Range
Both lenses have the same focal range of
35mm but while HD Pentax-FA 35mm F2 AL has the fastest aperture of
F2, the Rokinon 35mm f1.4's widest aperture value is
F1.4.