The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Hasselblad XCD 75mm f3.4 P and the Canon RF-S 3.9mm F3.5 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. Hasselblad XCD 75mm f3.4 P is the longer of the two lenses at 76mm. The Canon RF-S 3.9mm F3.5 with a length of 55mm, is 21mm shorter. On the other hand, the Canon RF-S 3.9mm F3.5 has a larger diameter of 112mm compared to the Hasselblad XCD 75mm f3.4 P's 75mm 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-S 3.9mm F3.5 weighs 290g, 27% (108g) lighter than the Hasselblad XCD 75mm f3.4 P's weight of 398g.
Filter Threads
The Hasselblad XCD 75mm f3.4 P has a filter size of 72mm whereas the Canon RF-S 3.9mm F3.5 has a 31mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 72mm filters that we recommend you to consider for the Hasselblad XCD 75mm f3.4 P:
And these are the 31mm filters that we recommend for the Canon RF-S 3.9mm F3.5:
Lens Mounts
The Hasselblad XCD 75mm f3.4 P has the Hasselblad X lens mount whereas the Canon RF-S 3.9mm F3.5 has the Canon RF lens mount. Some of the latest released cameras that are compatible with these mounts are Hasselblad X2D II, Hasselblad X2D and Hasselblad X1D II for the Hasselblad X Mount and Canon R50 V, Canon R100 and Canon R50 for the Canon RF Mount.
Focal Range
Hasselblad XCD 75mm f3.4 P is a prime lens with fixed focal lenght of 75mm.
On the other hand, the Canon RF-S 3.9mm F3.5 is a prime lens with fixed focal lenght of 3.9mm which has an effective (full-frame 35mm equivalent) focal range of 6.4mm when used on a APS-C / DX format camera.