The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Pentax 40mm F2.8 XS Lens and the Pentax 35mm F2.8 Macro 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. Pentax 35mm F2.8 Macro L is the longer of the two lenses at 47mm. The Pentax 40mm F2.8 XS Lens with a length of 9mm, is 38mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 63mm.
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 XS Lens weighs 45g, which means it is 169g (78%) lighter than the Pentax 35mm F2.8 Macro L which has a weight of 214g.
Lens Mounts
Both the Pentax 40mm F2.8 XS Lens and the Pentax 35mm F2.8 Macro L 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.
Pentax 35mm F2.8 Macro L is also available in Pentax KAF mount.
Focal Range
Pentax 40mm F2.8 XS Lens 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.
On the other hand, the Pentax 35mm F2.8 Macro L is a prime lens with fixed focal lenght of 35mm which has an effective (full-frame 35mm equivalent) focal range of 52.5mm when used on a APS-C / DX format camera.