The type of photography that you are planning to use is an important decision factor. Here we have evaluated the OM SYSTEM 9-18mm f4.0-5.6 II 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. OM SYSTEM 9-18mm f4.0-5.6 II is the longer of the two lenses at 49mm. The Venus 4mm F2.8 FMFT with a length of 26mm, is 23mm shorter. On the other hand, the Venus 4mm F2.8 FMFT has a larger diameter of 61mm compared to the OM SYSTEM 9-18mm f4.0-5.6 II's 56mm diameter.
Below you can find a scaled side-by-side image of OM SYSTEM 9-18mm f4.0-5.6 II and Venus 4mm F2.8 FMFT to get a better idea of how their sizes compare in real life.
Comparison image of the OM SYSTEM 9-18mm f4.0-5.6 II 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, 12% (19g) lighter than the OM SYSTEM 9-18mm f4.0-5.6 II's weight of 154g.
Lens Mounts
Both the OM SYSTEM 9-18mm f4.0-5.6 II and the Venus 4mm F2.8 FMFT has the same Micro Four Thirds lens mount . Some of the latest released cameras that are compatible with the Micro Four Thirds lenses are OM System OM-3 Astro , OM System OM-5 II and OM System OM-3 .
Focal Range
OM SYSTEM 9-18mm f4.0-5.6 II has a focal range of 9-18mm and
2.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
18-36mm when used on a FourThirds format camera.
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.
