The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Voigtlander 75mm f1.5 RF and the Canon RF 85mm F1.2L USM 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. Canon RF 85mm F1.2L USM is the longer of the two lenses at 117mm. The Voigtlander 75mm f1.5 RF with a length of 72mm, is 45mm shorter. Besides being longer, the Canon RF 85mm F1.2L USM also has a larger diameter of 103mm compared to the Voigtlander 75mm f1.5 RF's 74mm 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. Voigtlander 75mm f1.5 RF weighs 525g, which means it is 670g (56%) lighter than the Canon RF 85mm F1.2L USM which has a weight of 1195g.
Below you can find the dimension and weight table of the Telephoto Prime Lenses in Canon RF Mount for size comparison purposes.
Telephoto Lenses in Canon RF Mount for Size Comparison
Filter Threads
The Voigtlander 75mm f1.5 RF has a filter size of 62mm whereas the Canon RF 85mm F1.2L USM has a 82mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the Voigtlander 75mm f1.5 RF:
And these are the 82mm filters that we recommend for the Canon RF 85mm F1.2L USM:
Lens Mounts
Both the Voigtlander 75mm f1.5 RF and the Canon RF 85mm F1.2L USM has the same Canon RF lens mount. Some of the latest released cameras that are compatible with the Canon RF lenses are RED Komodo-X 6K, RED Komodo 6K and Canon EOS C70.
Focal Range
Voigtlander 75mm f1.5 RF is a prime lens with fixed focal lenght of 75mm which has an effective (full-frame 35mm equivalent) focal range of
112.5mm when used on a 35mm FF format camera.
On the other hand, the Canon RF 85mm F1.2L USM is a prime lens with fixed focal lenght of 85mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 136mm.
