The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon EF 50mm f/1.8 STM and the Carl Zeiss Makro-Planar T2/50 for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Carl Zeiss Makro-Planar T2/50 is the longer of the two lenses at 88mm. The Canon EF 50mm f/1.8 STM with a length of 39mm is 49mm shorter. Besides being longer, the Carl Zeiss Makro-Planar T2/50 also has a larger diameter of 72mm compared to Canon EF 50mm f/1.8 STM's 69mm 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. Canon EF 50mm f/1.8 STM weighs 159g, which means it is 371g (70%) lighter than the Carl Zeiss Makro-Planar T2/50 which has a weight of 530g.
Both Canon EF 50mm f/1.8 STM and Carl Zeiss Makro-Planar T2/50 has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Canon 1D X III, Canon 6D MII and Canon 5D MIV.
Carl Zeiss Makro-Planar T2/50 is also available in Pentax KAF and Nikon F (FX) mounts.