The type of photography that you are planning to use is an important decision factor. Here we have evaluated the HD Pentax-D FA 50mm F1.4 SDM AW and the PENTAX28-105mm F3.5-5.6 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. HD Pentax-D FA 50mm F1.4 SDM AW is the longer of the two lenses at 106mm. The PENTAX28-105mm F3.5-5.6 WR with a length of 87mm, is 19mm shorter. Besides being longer, the HD Pentax-D FA 50mm F1.4 SDM AW also has a larger diameter of 80mm compared to the PENTAX28-105mm F3.5-5.6 WR's 73mm diameter.
Below you can find a scaled side-by-side image of HD Pentax-D FA 50mm F1.4 SDM AW and PENTAX28-105mm F3.5-5.6 WR to get a better idea of how their sizes compare in real life.
Comparison image of the HD Pentax-D FA 50mm F1.4 SDM AW and the PENTAX28-105mm F3.5-5.6 WR 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. PENTAX28-105mm F3.5-5.6 WR weighs 440g, 51% (470g) lighter than the HD Pentax-D FA 50mm F1.4 SDM AW's weight of 910g.
Lens Mounts
Both the HD Pentax-D FA 50mm F1.4 SDM AW and the PENTAX28-105mm F3.5-5.6 WR has the same Pentax KAF3 lens mount . Some of the latest released cameras that are compatible with the Pentax KAF3 lenses are Pentax K-3 III Mono , Pentax KF and Pentax K-3 III .
Focal Range
HD Pentax-D FA 50mm F1.4 SDM AW 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 PENTAX28-105mm F3.5-5.6 WR has a focal range of 28-105mm and 3.8X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 42 - 157.5mm .
