The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Nikon DX Fisheye-10.5mm f2.8G ED and the Carl Zeiss Distagon T3,5/18 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. Carl Zeiss Distagon T3,5/18 is the longer of the two lenses at 84mm. The Nikon DX Fisheye-10.5mm f2.8G ED with a length of 63mm, is 21mm shorter. Besides being longer, the Carl Zeiss Distagon T3,5/18 also has a larger diameter of 87mm compared to the Nikon DX Fisheye-10.5mm f2.8G ED's 63mm 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 DX Fisheye-10.5mm f2.8G ED weighs 300g, which means it is 170g (36%) lighter than the Carl Zeiss Distagon T3,5/18 which has a weight of 470g.
Lens Mounts
The Nikon DX Fisheye-10.5mm f2.8G ED has the Nikon F (DX) lens mount whereas the Carl Zeiss Distagon T3,5/18 has the Nikon F (FX) 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 Nikon D6, Nikon D780 and Nikon D3500 for the Nikon F (FX) Mount.
Carl Zeiss Distagon T3,5/18 is also available in Canon EF and Pentax KAF mounts.
Focal Range
Nikon DX Fisheye-10.5mm f2.8G ED is a prime lens with fixed focal lenght of 11mm which has an effective (full-frame 35mm equivalent) focal range of
16.5mm when used on a APS-C / DX format camera.
On the other hand, the Carl Zeiss Distagon T3,5/18 is a prime lens with fixed focal lenght of 18mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 27mm.