The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Zeiss Otus 85mm F1.4 and the Canon 75-300mm f4.0-5.6 III 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. Zeiss Otus 85mm F1.4 is the longer of the two lenses at 138mm. The Canon 75-300mm f4.0-5.6 III USM with a length of 122mm, is 16mm shorter. Besides being longer, the Zeiss Otus 85mm F1.4 also has a larger diameter of 101mm compared to the Canon 75-300mm f4.0-5.6 III USM's 71mm 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 75-300mm f4.0-5.6 III USM weighs 480g, 60% (720g) lighter than the Zeiss Otus 85mm F1.4's weight of 1200g.
Filter Threads
The Zeiss Otus 85mm F1.4 has a filter size of 86mm whereas the Canon 75-300mm f4.0-5.6 III USM has a 58mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 86mm filters that we recommend you to consider for the Zeiss Otus 85mm F1.4:
And these are the 58mm filters that we recommend for the Canon 75-300mm f4.0-5.6 III USM:
Lens Mounts
Both the Zeiss Otus 85mm F1.4 and the Canon 75-300mm f4.0-5.6 III USM has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K.
Zeiss Otus 85mm F1.4 is also available in the Nikon F (FX) , Sony E, Canon RF and Nikon Z mounts.
Focal Range
Zeiss Otus 85mm F1.4 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.
On the other hand, the Canon 75-300mm f4.0-5.6 III USM has a focal range of 75-300mm and 4.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 120 - 480mm.
