The type of photography that you are planning to use is an important decision factor. Here we have evaluated the OM System 90mm F3.5 Macro 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. OM System 90mm F3.5 Macro is the longer of the two lenses at 136mm. The Venus 25mm F2.8 2.5-5X Ultra Macro with a length of 65mm, is 71mm shorter. On the other hand, the Venus 25mm F2.8 2.5-5X Ultra Macro has a larger diameter of 82mm compared to the OM System 90mm F3.5 Macro's 70mm diameter.
Below you can find a scaled side-by-side image of OM System 90mm F3.5 Macro 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 OM System 90mm F3.5 Macro 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, 11% (53g) lighter than the OM System 90mm F3.5 Macro's weight of 453g.
Lens Mounts
The OM System 90mm F3.5 Macro has the Micro Four Thirds lens mount whereas the Venus 25mm F2.8 2.5-5X Ultra Macro has the Sony E lens mount . Some of the latest released cameras that are compatible with these mounts are OM System OM-3 Astro , OM System OM-5 II and OM System OM-3 for the Micro Four Thirds Mount and Sony FX5 , Sony A7R VI and Sony A7 V for the Sony E Mount.
Canon EF , Nikon F (DX) and Pentax KAF2 mounts.
Focal Range
OM System 90mm F3.5 Macro is a prime lens with fixed focal lenght of 90mm which has an effective (full-frame 35mm equivalent) focal range of
180mm when used on a FourThirds format camera.
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 1.5x crop, it provides a 35mm (FF) equivalent of 37.5mm .
