The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Nikon PC 19mm F4E ED and the Sigma 10mm 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 PC 19mm F4E ED is the longer of the two lenses at 124mm. The Sigma 10mm F2.8 EX DC HSM Fisheye with a length of 83mm, is 41mm shorter. Besides being longer, the Nikon PC 19mm F4E ED also has a larger diameter of 89mm compared to the Sigma 10mm F2.8 EX DC HSM Fisheye's 76mm 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. Sigma 10mm F2.8 EX DC HSM Fisheye weighs 475g, 46% (410g) lighter than the Nikon PC 19mm F4E ED's weight of 885g.
Lens Mounts
The Nikon PC 19mm F4E ED has the Nikon F (FX) lens mount whereas the Sigma 10mm F2.8 EX DC HSM Fisheye has the Nikon F (DX) lens mount. Some of the latest released cameras that are compatible with these mounts are Nikon D6, Nikon D780 and Nikon D3500 for the Nikon F (FX) Mount and Nikon D3500, Nikon D7500 and Nikon D5600 for the Nikon F (DX) Mount.
Sigma 10mm F2.8 EX DC HSM Fisheye is also available in Canon EF and Sigma SA mounts.
Focal Range
Nikon PC 19mm F4E ED is a prime lens with fixed focal lenght of 19mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
28.5mm.
On the other hand, the Sigma 10mm F2.8 EX DC HSM Fisheye is a prime lens with fixed focal lenght of 10mm which has an effective (full-frame 35mm equivalent) focal range of 15mm when used on a APS-C / DX format camera.
