The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 300-600mm f4 and the Canon RF 1200mm F8L 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 RF 1200mm F8L is the longer of the two lenses at 537mm. The Sigma 300-600mm f4 with a length of 470mm, is 67mm shorter. Besides being longer, the Canon RF 1200mm F8L also has a larger diameter of 168mm compared to the Sigma 300-600mm f4's 167mm diameter.
Below you can find a scaled side-by-side image of Sigma 300-600mm f4 and Canon RF 1200mm F8L to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 300-600mm f4 and the Canon RF 1200mm F8L Size and Weight 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 1200mm F8L weighs 3340g, 15% (630g) lighter than the Sigma 300-600mm f4's weight of 3970g.
Filter Threads
The Sigma 300-600mm f4 has a filter size of 41mm whereas the Canon RF 1200mm F8L 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 41mm filters that we recommend you to consider for the Sigma 300-600mm f4:
And these are the 52mm filters that we recommend for the Canon RF 1200mm F8L:
Lens Mounts
The Sigma 300-600mm f4 has the Sony E lens mount whereas the Canon RF 1200mm F8L has the Canon RF lens mount . Some of the latest released cameras that are compatible with these mounts are Sony FX5 , Sony A7R VI and Sony A7 V for the Sony E Mount and Canon R6 V , Canon R6 III and Canon C50 for the Canon RF Mount.
Focal Range
Sigma 300-600mm f4 has a focal range of 300-600mm and
2.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
450 - 900mm .
On the other hand, the Canon RF 1200mm F8L is a prime lens with fixed focal lenght of 1200mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 1920mm .
