The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Pentax 06 Telephoto 15-45mm and the Canon 75-300mm f4.0-5.6 III 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 75-300mm f4.0-5.6 III is the longer of the two lenses at 122mm. The Pentax 06 Telephoto 15-45mm with a length of 56mm, is 66mm shorter. Besides being longer, the Canon 75-300mm f4.0-5.6 III also has a larger diameter of 71mm compared to the Pentax 06 Telephoto 15-45mm's 50mm 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 06 Telephoto 15-45mm weighs 90g, which means it is 390g (81%) lighter than the Canon 75-300mm f4.0-5.6 III which has a weight of 480g.
Filter Threads
The Pentax 06 Telephoto 15-45mm has a filter size of 41mm whereas the Canon 75-300mm f4.0-5.6 III has a 58mm 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 Pentax 06 Telephoto 15-45mm:
And these are the 58mm filters that we recommend for the Canon 75-300mm f4.0-5.6 III:
Lens Mounts
The Pentax 06 Telephoto 15-45mm has the Pentax Q lens mount whereas the Canon 75-300mm f4.0-5.6 III has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are , and for the Pentax Q Mount and Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K for the Canon EF Mount.
Focal Range
Pentax 06 Telephoto 15-45mm has a focal range of 15-45mm and
3.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
68.25-204.75mm when used on a 1/1.7" format camera.
On the other hand, the Canon 75-300mm f4.0-5.6 III has a focal range of 75-300mm 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 120 - 480mm.
