The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony FE 55mm F1.8 ZA CZ and the Sigma 60mm F2.8 DN for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Sony FE 55mm F1.8 ZA CZ is the longer of the two lenses at 71mm. The Sigma 60mm F2.8 DN with a length of 56mm is 15mm shorter. Besides being longer, the Sony FE 55mm F1.8 ZA CZ also has a larger diameter of 64mm compared to Sigma 60mm F2.8 DN's 61mm diameter.
Weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Sigma 60mm F2.8 DN weighs 190g, 32% (91g) lighter than the Sony FE 55mm F1.8 ZA CZ's weight of 281g.
Lens Mounts
Both Sony FE 55mm F1.8 ZA CZ and Sigma 60mm F2.8 DN has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony A7R V, Sony FX30 and Sony A7 IV.
Sigma 60mm F2.8 DN is also available in Micro Four Thirds mount.
Focal Range
Sony FE 55mm F1.8 ZA CZ is a prime lens with fixed focal lenght of 55mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 82.5mm.
Sigma 60mm F2.8 DN is a prime lens with fixed focal lenght of 60mm which has an effective (full-frame 35mm equivalent) focal range of 90mm when used on a APS-C / DX format camera.