The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samsung NX-M 9mm F3.5 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 NX-M 9mm F3.5 with a length of 13mm, is 64mm shorter. Besides being longer, the Rokinon 8mm f3.5 Fisheye also has a larger diameter of 75mm compared to the Samsung NX-M 9mm F3.5's 50mm 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 NX-M 9mm F3.5 weighs 31g, which means it is 412g (93%) lighter than the Rokinon 8mm f3.5 Fisheye which has a weight of 443g.
Lens Mounts
The Samsung NX-M 9mm F3.5 has the Samsung NX-M lens mount whereas the Rokinon 8mm f3.5 Fisheye has the Samsung NX lens mount. Some of the latest released cameras that are compatible with these mounts are Samsung NX mini, and for the Samsung NX-M Mount and Samsung NX1, Samsung NX3000 and Samsung NX30 for the Samsung NX Mount.
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 NX-M 9mm F3.5 is a prime lens with fixed focal lenght of 9mm which has an effective (full-frame 35mm equivalent) focal range of
24.3mm when used on a 1" 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.
