The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 50mm F1.4 AS UMC and the HD Pentax-FA 35mm F2 AL 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. Samyang 50mm F1.4 AS UMC is the longer of the two lenses at 75mm. The HD Pentax-FA 35mm F2 AL with a length of 45mm, is 30mm shorter. Besides being longer, the Samyang 50mm F1.4 AS UMC also has a larger diameter of 82mm compared to the HD Pentax-FA 35mm F2 AL's 64mm diameter.
Below you can find a scaled side-by-side image of Samyang 50mm F1.4 AS UMC and HD Pentax-FA 35mm F2 AL to get a better idea of how their sizes compare in real life.
Comparison image of the Samyang 50mm F1.4 AS UMC and the HD Pentax-FA 35mm F2 AL Size and Weight 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, 63% (342g) lighter than the Samyang 50mm F1.4 AS UMC's weight of 535g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Pentax KAF Mount for size comparison purposes.
Standard Pentax KAF Mount
Filter Threads
The Samyang 50mm F1.4 AS UMC has a filter size of 77mm whereas the HD Pentax-FA 35mm F2 AL 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 77mm filters that we recommend you to consider for the Samyang 50mm F1.4 AS UMC:
And these are the 49mm filters that we recommend for the HD Pentax-FA 35mm F2 AL:
Lens Mounts
Both the Samyang 50mm F1.4 AS UMC and the HD Pentax-FA 35mm F2 AL 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 Mono , Pentax KF and Pentax K-3 III .
Canon EF , Nikon F (FX) , Sony Alpha and Sony E mounts.
Focal Range
Samyang 50mm F1.4 AS UMC is a prime lens with fixed focal lenght of 50mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
75mm .
On the other hand, the HD Pentax-FA 35mm F2 AL is a prime lens with fixed focal lenght of 35mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 52.5mm .
