The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon 50mm f1.8 II and the Canon 50mm 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 50mm f1.2L USM is the longer of the two lenses at 66mm. The Canon 50mm f1.8 II with a length of 41mm, is 25mm shorter. Besides being longer, the Canon 50mm f1.2L USM also has a larger diameter of 86mm compared to the Canon 50mm f1.8 II'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 50mm f1.8 II weighs 130g, which means it is 450g (77%) lighter than the Canon 50mm f1.2L USM which has a weight of 580g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Canon EF Mount for size comparison purposes.
Standard Lenses in Canon EF Mount for Size Comparison
Filter Threads
The Canon 50mm f1.8 II has a filter size of 52mm whereas the Canon 50mm f1.2L USM has a 72mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 52mm filters that we recommend you to consider for the Canon 50mm f1.8 II:
And these are the 72mm filters that we recommend for the Canon 50mm f1.2L USM:
Lens Mounts
Both the Canon 50mm f1.8 II and the Canon 50mm f1.2L USM 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.
Focal Range
Both lenses have the same focal range of
50mm but while Canon 50mm f1.8 II has the fastest aperture of
F1.8, the Canon 50mm f1.2L USM's widest aperture value is
F1.2.