The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 150-600mm F5-6.3 DG OS HSM C and the Sigma 18-300 F3.5-6.3 DC OS HSM 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. Sigma 150-600mm F5-6.3 DG OS HSM C is the longer of the two lenses at 290mm. The Sigma 18-300 F3.5-6.3 DC OS HSM with a length of 102mm, is 188mm shorter. Besides being longer, the Sigma 150-600mm F5-6.3 DG OS HSM C also has a larger diameter of 121mm compared to the Sigma 18-300 F3.5-6.3 DC OS HSM's 79mm diameter.
Below you can find a scaled side-by-side image of Sigma 150-600mm F5-6.3 DG OS HSM C and Sigma 18-300 F3.5-6.3 DC OS HSM to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 150-600mm F5-6.3 DG OS HSM C and the Sigma 18-300 F3.5-6.3 DC OS HSM 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. Sigma 18-300 F3.5-6.3 DC OS HSM weighs 585g, 69% (1345g) lighter than the Sigma 150-600mm F5-6.3 DG OS HSM C's weight of 1930g.
Below you can find the dimension and weight table of the Telephoto Zoom Lenses in Canon EF Mount for size comparison purposes.
Super Telephoto Canon EF Mount
Filter Threads
The Sigma 150-600mm F5-6.3 DG OS HSM C has a filter size of 95mm whereas the Sigma 18-300 F3.5-6.3 DC OS HSM 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 95mm filters that we recommend you to consider for the Sigma 150-600mm F5-6.3 DG OS HSM C:
And these are the 72mm filters that we recommend for the Sigma 18-300 F3.5-6.3 DC OS HSM:
Lens Mounts
Both the Sigma 150-600mm F5-6.3 DG OS HSM C and the Sigma 18-300 F3.5-6.3 DC OS HSM has the same Canon EF lens mount . Some of the latest released cameras that are compatible with the Canon EF lenses are Blackmagic URSA 12K LF , Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K .
Nikon F (FX) , Sigma SA and Sony Alpha mounts.
Nikon F (DX) , Pentax KAF3 , Sigma SA and Sony Alpha mounts.
Focal Range
Sigma 150-600mm F5-6.3 DG OS HSM C has a focal range of 150-600mm and
4.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
240 - 960mm .
On the other hand, the Sigma 18-300 F3.5-6.3 DC OS HSM has a focal range of 18-300mm and 16.7X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 28.8-480mm when used on a APS-C / DX format camera.
