The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samsung D-Xenon 35mm F2 AL and the Pentax 40mm F2.8 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 35mm F2 AL is the longer of the two lenses at 45mm. The Pentax 40mm F2.8 L with a length of 15mm, is 30mm shorter. Besides being longer, the Samsung D-Xenon 35mm F2 AL also has a larger diameter of 64mm compared to the Pentax 40mm F2.8 L'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. Pentax 40mm F2.8 L weighs 90g, 53% (105g) lighter than the Samsung D-Xenon 35mm F2 AL's weight of 195g.
Filter Threads
Both the Samsung D-Xenon 35mm F2 AL and the Pentax 40mm F2.8 L have the same Filter thread size of 49mm.
Below are links to the 49mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Samsung D-Xenon 35mm F2 AL has the Pentax KAF2 lens mount whereas the Pentax 40mm F2.8 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 Monochrome, Pentax KF and Pentax K-3 III for the Pentax KAF Mount.
Pentax 40mm F2.8 L is also available in Pentax KAF mount.
Focal Range
Samsung D-Xenon 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.
On the other hand, the Pentax 40mm F2.8 L is a prime lens with fixed focal lenght of 40mm which has an effective (full-frame 35mm equivalent) focal range of 60mm when used on a APS-C / DX format camera.