The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Lensbaby Sol 45 DSLR and the Canon 40mm f2.8 STM for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Lensbaby Sol 45 DSLR is the longer of the two lenses at 39mm. The Canon 40mm f2.8 STM with a length of 22mm is 17mm shorter. Besides being longer, the Lensbaby Sol 45 DSLR also has a larger diameter of 73mm compared to Canon 40mm f2.8 STM's 68mm diameter.
Weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Canon 40mm f2.8 STM weighs 130g, 9% (14g) lighter than the Lensbaby Sol 45 DSLR's weight of 144g.
Lens Mounts
Both Lensbaby Sol 45 DSLR and Canon 40mm f2.8 STM has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Canon 1D X III, Canon 6D MII and Canon 5D MIV.
Lensbaby Sol 45 DSLR is also available in Fujifilm X , Nikon F (FX), Pentax KAF and Sony Alpha mounts.
Focal Range
Lensbaby Sol 45 DSLR is a prime lens with fixed focal lenght of 45mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides an 35mm (FF) equivalent of 72mm.
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 an 35mm (FF) equivalent of 64mm.