The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 100-500mm and the Pentax DA 60-250mm F4.0 ED 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 100-500mm is the longer of the two lenses at 208mm. The Pentax DA 60-250mm F4.0 ED with a length of 168mm, is 40mm shorter. Besides being longer, the Canon RF 100-500mm also has a larger diameter of 94mm compared to the Pentax DA 60-250mm F4.0 ED's 82mm 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. Pentax DA 60-250mm F4.0 ED weighs 1040g, 23% (325g) lighter than the Canon RF 100-500mm's weight of 1365g.
Filter Threads
The Canon RF 100-500mm has a filter size of 77mm whereas the Pentax DA 60-250mm F4.0 ED has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 77mm filters that we recommend you to consider for the Canon RF 100-500mm:
And these are the 67mm filters that we recommend for the Pentax DA 60-250mm F4.0 ED:
Lens Mounts
The Canon RF 100-500mm has the Canon RF lens mount whereas the Pentax DA 60-250mm F4.0 ED has the Pentax KAF2 lens mount. Some of the latest released cameras that are compatible with these mounts are Canon R6 V, Canon R6 III and Canon C50 for the Canon RF Mount and , and for the Pentax KAF2 Mount.
Focal Range
Canon RF 100-500mm has a focal range of 100-500mm and
5.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
160 - 800mm.
On the other hand, the Pentax DA 60-250mm F4.0 ED has a focal range of 60-250mm and 4.2X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 90-375mm when used on a APS-C / DX format camera.
