The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Hasselblad XCD 45mm F3.5 and the Canon 40mm f2.8 STM 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 45mm F3.5 is the longer of the two lenses at 75mm. The Canon 40mm f2.8 STM with a length of 22mm, is 53mm shorter. Besides being longer, the Hasselblad XCD 45mm F3.5 also has a larger diameter of 77mm compared to the Canon 40mm f2.8 STM's 68mm 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 40mm f2.8 STM weighs 130g, 72% (345g) lighter than the Hasselblad XCD 45mm F3.5's weight of 475g.
Filter Threads
The Hasselblad XCD 45mm F3.5 has a filter size of 67mm whereas the Canon 40mm f2.8 STM has a 52mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Hasselblad XCD 45mm F3.5:
And these are the 52mm filters that we recommend for the Canon 40mm f2.8 STM:
Lens Mounts
The Hasselblad XCD 45mm F3.5 has the Hasselblad X lens mount whereas the Canon 40mm f2.8 STM has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Hasselblad X2D, Hasselblad X1D II 50C and Hasselblad X1D for the Hasselblad X Mount and Canon 1D X III, Canon 6D MII and Canon 5D MIV for the Canon EF Mount.
Focal Range
Hasselblad XCD 45mm F3.5 is a prime lens with fixed focal lenght of 45mm.
On the other hand, the Canon 40mm f2.8 STM is a prime lens with fixed focal lenght of 40mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 64mm.