The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 11-20mm F2.8 A 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. Samyang 8mm F2.8 Fisheye weighs 265g, 20% (70g) lighter than the Tamron 11-20mm F2.8 A's weight of 335g.
Lens Mounts
Both the Tamron 11-20mm F2.8 A and the Samyang 8mm F2.8 Fisheye has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony ZV-E10 II, Sony A6700 and Sony FX30.
Samyang 8mm F2.8 Fisheye is also available in Samsung NX mount.
Focal Range
Tamron 11-20mm F2.8 A has a focal range of 11-20mm and
1.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
16.5-30mm when used on a APS-C / DX 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.
