The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF-S 18-45mm f4.5-6.3 IS and the Pentax 01 Standard Prime 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-S 18-45mm f4.5-6.3 IS is the longer of the two lenses at 44mm. The Pentax 01 Standard Prime with a length of 23mm, is 21mm shorter. Besides being longer, the Canon RF-S 18-45mm f4.5-6.3 IS also has a larger diameter of 69mm compared to the Pentax 01 Standard Prime's 46mm 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 01 Standard Prime weighs 37g, 71% (93g) lighter than the Canon RF-S 18-45mm f4.5-6.3 IS's weight of 130g.
Filter Threads
The Canon RF-S 18-45mm f4.5-6.3 IS has a filter size of 49mm whereas the Pentax 01 Standard Prime has a 41mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 49mm filters that we recommend you to consider for the Canon RF-S 18-45mm f4.5-6.3 IS:
And these are the 41mm filters that we recommend for the Pentax 01 Standard Prime:
Lens Mounts
The Canon RF-S 18-45mm f4.5-6.3 IS has the Canon RF lens mount whereas the Pentax 01 Standard Prime has the Pentax Q lens mount. Some of the latest released cameras that are compatible with these mounts are Canon R50 V, Canon R100 and Canon R50 for the Canon RF Mount and , and for the Pentax Q Mount.
Focal Range
Canon RF-S 18-45mm f4.5-6.3 IS has a focal range of 18-45mm and
2.5X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
28.8-72mm when used on a APS-C / DX format camera.
On the other hand, the Pentax 01 Standard Prime is a prime lens with fixed focal lenght of 9mm which has an effective (full-frame 35mm equivalent) focal range of 40.95mm when used on a 1/1.7" format camera.
