The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samsung 45mm F1.8 and the Rokinon 8mm f3.5 Fisheye 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. Rokinon 8mm f3.5 Fisheye is the longer of the two lenses at 77mm. The Samsung 45mm F1.8 with a length of 45mm, is 32mm shorter. Besides being longer, the Rokinon 8mm f3.5 Fisheye also has a larger diameter of 75mm compared to the Samsung 45mm F1.8's 62mm diameter.
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. Samsung 45mm F1.8 weighs 115g, which means it is 328g (74%) lighter than the Rokinon 8mm f3.5 Fisheye which has a weight of 443g.
Lens Mounts
Both the Samsung 45mm F1.8 and the Rokinon 8mm f3.5 Fisheye has the same Samsung NX lens mount. Some of the latest released cameras that are compatible with the Samsung NX lenses are Samsung NX1, Samsung NX3000 and Samsung NX30.
Rokinon 8mm f3.5 Fisheye is also available in Canon EF , Nikon F (FX), Four Thirds, Pentax KAF and Sony Alpha mounts.
Focal Range
Samsung 45mm F1.8 is a prime lens with fixed focal lenght of 45mm which has an effective (full-frame 35mm equivalent) focal range of
67.5mm when used on a APS-C / DX format camera.
On the other hand, the Rokinon 8mm f3.5 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.
