The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 15-30mm F4.5-6.3 IS and the Venus 4mm F2.8 FMFT 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 15-30mm F4.5-6.3 IS is the longer of the two lenses at 88mm. The Venus 4mm F2.8 FMFT with a length of 26mm, is 62mm shorter. Besides being longer, the Canon RF 15-30mm F4.5-6.3 IS also has a larger diameter of 77mm compared to the Venus 4mm F2.8 FMFT's 61mm diameter.
Below you can find a scaled side-by-side image of Canon RF 15-30mm F4.5-6.3 IS and Venus 4mm F2.8 FMFT to get a better idea of how their sizes compare in real life.
Comparison image of the Canon RF 15-30mm F4.5-6.3 IS and the Venus 4mm F2.8 FMFT 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 4mm F2.8 FMFT weighs 135g, 65% (255g) lighter than the Canon RF 15-30mm F4.5-6.3 IS's weight of 390g.
Lens Mounts
The Canon RF 15-30mm F4.5-6.3 IS has the Canon RF lens mount whereas the Venus 4mm F2.8 FMFT has the Micro Four Thirds 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 OM System OM-3 Astro , OM System OM-5 II and OM System OM-3 for the Micro Four Thirds Mount.
Focal Range
Canon RF 15-30mm F4.5-6.3 IS has a focal range of 15-30mm and
2.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
24 - 48mm .
On the other hand, the Venus 4mm F2.8 FMFT is a prime lens with fixed focal lenght of 4mm which has an effective (full-frame 35mm equivalent) focal range of 8mm when used on a FourThirds format camera.
