The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Venus 7.5mm F2 MFT and the Samyang 8mm F2.8 Fisheye for their suitability to various photography scenarios:
Size and Weight Comparison
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 7.5mm F2 MFT weighs 170g, which means it is 95g (35%) lighter than the Samyang 8mm F2.8 Fisheye which has a weight of 265g.
Lens Mounts
The Venus 7.5mm F2 MFT has the Micro Four Thirds lens mount whereas the Samyang 8mm F2.8 Fisheye 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 ZV-E10 II, Sony A6700 and Sony FX30 for the Sony E Mount.
Samyang 8mm F2.8 Fisheye is also available in Samsung NX mount.
Focal Range
Venus 7.5mm F2 MFT is a prime lens with fixed focal lenght of 7.5mm which has an effective (full-frame 35mm equivalent) focal range of
16mm when used on a FourThirds format camera.
On the other hand, the Samyang 8mm F2.8 Fisheye is a prime lens with fixed focal lenght of 8mm which has an effective (full-frame 35mm equivalent) focal range of 12mm when used on a APS-C / DX format camera.
