The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Nikon 55-200mm f4-5.6G VR II and the Sigma 4.5mm F2.8 EX DC HSM 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. Nikon 55-200mm f4-5.6G VR II is the longer of the two lenses at 83mm. The Sigma 4.5mm F2.8 EX DC HSM Fisheye with a length of 78mm, is 5mm shorter. On the other hand, the Sigma 4.5mm F2.8 EX DC HSM Fisheye has a larger diameter of 76mm compared to the Nikon 55-200mm f4-5.6G VR II's 71mm 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. Nikon 55-200mm f4-5.6G VR II weighs 335g, which means it is 135g (28%) lighter than the Sigma 4.5mm F2.8 EX DC HSM Fisheye which has a weight of 470g.
Lens Mounts
The Nikon 55-200mm f4-5.6G VR II has the Nikon F (DX) lens mount whereas the Sigma 4.5mm F2.8 EX DC HSM Fisheye has the Sigma SA lens mount. Some of the latest released cameras that are compatible with these mounts are Nikon D3500, Nikon D7500 and Nikon D5600 for the Nikon F (DX) Mount and Sigma SD1 Merrill, Sigma SD1 and for the Sigma SA Mount.
Sigma 4.5mm F2.8 EX DC HSM Fisheye is also available in Canon EF and Nikon F (DX) mounts.
Focal Range
Nikon 55-200mm f4-5.6G VR II has a focal range of 55-200mm and
3.6X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
82.5-300mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 4.5mm F2.8 EX DC HSM Fisheye is a prime lens with fixed focal lenght of 5mm which has an effective (full-frame 35mm equivalent) focal range of 7.5mm when used on a APS-C / DX format camera.
