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 Voigtlander 28mm F2.8 Color Skopar SL II 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. Venus 25mm F2.8 2.5-5X Ultra Macro is the longer of the two lenses at 65mm. The Voigtlander 28mm F2.8 Color Skopar SL II with a length of 25mm, is 40mm shorter. Besides being longer, the Venus 25mm F2.8 2.5-5X Ultra Macro also has a larger diameter of 82mm compared to the Voigtlander 28mm F2.8 Color Skopar SL II'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. Voigtlander 28mm F2.8 Color Skopar SL II weighs 180g, 55% (220g) lighter than the Venus 25mm F2.8 2.5-5X Ultra Macro's weight of 400g.
Lens Mounts
The Venus 25mm F2.8 2.5-5X Ultra Macro has the Nikon F (DX) lens mount whereas the Voigtlander 28mm F2.8 Color Skopar SL II has the Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with these mounts are Nikon D6, Nikon D780 and Nikon D3500 for the Nikon F (DX) Mount and Nikon D6, Nikon D780 and Nikon D3500 for the Nikon F (FX) Mount.
Venus 25mm F2.8 2.5-5X Ultra Macro is also available in Canon EF , Pentax KAF2 and Sony E mounts.
Voigtlander 28mm F2.8 Color Skopar SL II is also available in Canon EF mount.
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 Voigtlander 28mm F2.8 Color Skopar SL II is a prime lens with fixed focal lenght of 28mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 42mm.