The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Venus 25mm F2.8 2.5-5X Ultra Macro and the Samsung D-Xenon 100mm F2.8 macro 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 100mm F2.8 macro is the longer of the two lenses at 81mm. The Venus 25mm F2.8 2.5-5X Ultra Macro with a length of 65mm, is 16mm shorter. On the other hand, the Venus 25mm F2.8 2.5-5X Ultra Macro has a larger diameter of 82mm compared to the Samsung D-Xenon 100mm F2.8 macro's 68mm 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. Samsung D-Xenon 100mm F2.8 macro weighs 345g, 13% (55g) lighter than the Venus 25mm F2.8 2.5-5X Ultra Macro's weight of 400g.
Below you can find the dimension and weight table of the Macro Prime Lenses in Pentax KAF2 Mount for size comparison purposes.
Macro Lenses in Pentax KAF2 Mount for Size Comparison
Lens Mounts
Both the Venus 25mm F2.8 2.5-5X Ultra Macro and the Samsung D-Xenon 100mm F2.8 macro has the same Pentax KAF2 lens mount. Some of the latest released cameras that are compatible with the Pentax KAF2 lenses are Pentax K-3 III Mono, Pentax KF and Pentax K-3 III.
Venus 25mm F2.8 2.5-5X Ultra Macro is also available in the Canon EF , Nikon F (DX) and Sony E mounts.
Focal Range
Venus 25mm F2.8 2.5-5X Ultra Macro is a prime lens with fixed focal lenght of 25mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
37.5mm.
On the other hand, the Samsung D-Xenon 100mm F2.8 macro is a prime lens with fixed focal lenght of 100mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 150mm.
