In this review, we will be comparing Canon 400mm f2.8L IS USM and Canon 400mm f5.6L USM, two Telephoto Prime lenses by Canon. Both cameras have the same focal range of 400mm but different max apertures: Canon 400mm f2.8L IS USM has a max aperture of F2.8 while the Canon 400mm f5.6L USM has a max aperture of F5.6.
We will start with briefly looking and the main specs of these two lenses and in the section, we will start analyzing in more detail and list the pros and cons of each lenses.
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Canon 400mm f2.8L IS USM is the longer of the two lenses at 349mm. The Canon 400mm f5.6L USM with a length of 257mm is 92mm shorter. Besides being longer, the Canon 400mm f2.8L IS USM also has a larger diameter of 163mm compared to Canon 400mm f5.6L USM's 90mm 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 400mm f5.6L USM weighs 1250g, 76% (4120g) lighter than the Canon 400mm f2.8L IS USM's weight of 5370g.
Below you can find the dimension and weight table of the 'Telephoto Prime Lenses in Canon EF Mount for size comparison purposes.
Telephoto Prime Lenses in Canon EF Mount for Size Comparison
Both Canon 400mm f2.8L IS USM and Canon 400mm f5.6L 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.