The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 8mm F2.8 Fisheye and the Samsung NX-M 9-27mm F3.5-5.6 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. Samsung NX-M 9-27mm F3.5-5.6 weighs 73g, 72% (192g) lighter than the Samyang 8mm F2.8 Fisheye's weight of 265g.
Lens Mounts
The Samyang 8mm F2.8 Fisheye has the Samsung NX lens mount whereas the Samsung NX-M 9-27mm F3.5-5.6 has the Samsung NX-M lens mount. Some of the latest released cameras that are compatible with these mounts are Samsung NX1, Samsung NX3000 and Samsung NX30 for the Samsung NX Mount and Samsung NX mini, and for the Samsung NX-M Mount.
Samyang 8mm F2.8 Fisheye is also available in the Sony E mount.
Focal Range
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.
On the other hand, the Samsung NX-M 9-27mm F3.5-5.6 has a focal range of 9-27mm and 3.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 24.3-72.9mm when used on a 1" format camera.