The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 100mm F2.8L Macro IS and the Venus 25mm F2.8 2.5-5X Ultra 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. Canon RF 100mm F2.8L Macro IS is the longer of the two lenses at 148mm. The Venus 25mm F2.8 2.5-5X Ultra Macro with a length of 65mm, is 83mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 82mm.
Below you can find a scaled side-by-side image of Canon RF 100mm F2.8L Macro IS and Venus 25mm F2.8 2.5-5X Ultra Macro to get a better idea of how their sizes compare in real life.
Comparison image of the Canon RF 100mm F2.8L Macro IS and the Venus 25mm F2.8 2.5-5X Ultra Macro 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. Venus 25mm F2.8 2.5-5X Ultra Macro weighs 400g, 45% (330g) lighter than the Canon RF 100mm F2.8L Macro IS's weight of 730g.
Lens Mounts
The Canon RF 100mm F2.8L Macro IS has the Canon RF lens mount whereas the Venus 25mm F2.8 2.5-5X Ultra Macro has the Canon EF lens mount . Some of the latest released cameras that are compatible with these mounts are Canon R6 V , Canon R6 III and Canon C50 for the Canon RF Mount and Blackmagic URSA 12K LF , Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K for the Canon EF Mount.
Venus 25mm F2.8 2.5-5X Ultra Macro is also available in Nikon F (DX) , Pentax KAF2 and Sony E mounts.
Focal Range
Canon RF 100mm F2.8L Macro IS is a prime lens with fixed focal lenght of 100mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
160mm .
On the other hand, the 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 1.6x crop, it provides a 35mm (FF) equivalent of 40mm .