The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 50mm F1.8 STM and the Carl Zeiss Planar T2/50 ZM 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 Planar T2/50 ZM is the longer of the two lenses at 68mm. The Canon RF 50mm F1.8 STM with a length of 41mm, is 27mm shorter. On the other hand, the Canon RF 50mm F1.8 STM has a larger diameter of 69mm compared to the Carl Zeiss Planar T2/50 ZM's 52mm 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. Canon RF 50mm F1.8 STM weighs 160g, which means it is 70g (30%) lighter than the Carl Zeiss Planar T2/50 ZM which has a weight of 230g.
Filter Threads
Both the Canon RF 50mm F1.8 STM and the Carl Zeiss Planar T2/50 ZM have the same Filter thread size of 43mm.
Below are links to the 43mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Canon RF 50mm F1.8 STM has the Canon RF lens mount whereas the Carl Zeiss Planar T2/50 ZM has the Leica M lens mount. Some of the latest released cameras that are compatible with these mounts are Canon R6 V, Canon R6 III and Canon C50 for the Canon RF Mount and Leica M EV1, Leica M11-D and Pixii Max for the Leica M Mount.
Focal Range
Both lenses have the same focal range of
50mm but while Canon RF 50mm F1.8 STM has the fastest aperture of
F1.8, the Carl Zeiss Planar T2/50 ZM's widest aperture value is
F2.0.
