The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Fujifilm 23mm F2 WR and the Pentax D FA 645 25mm F4 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. Pentax D FA 645 25mm F4 is the longer of the two lenses at 140mm. The Fujifilm 23mm F2 WR with a length of 52mm, is 88mm shorter. Besides being longer, the Pentax D FA 645 25mm F4 also has a larger diameter of 90mm compared to the Fujifilm 23mm F2 WR's 60mm 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. Fujifilm 23mm F2 WR weighs 180g, which means it is 890g (83%) lighter than the Pentax D FA 645 25mm F4 which has a weight of 1070g.
Filter Threads
The Fujifilm 23mm F2 WR has a filter size of 43mm whereas the Pentax D FA 645 25mm F4 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 43mm filters that we recommend you to consider for the Fujifilm 23mm F2 WR:
And these are the 41mm filters that we recommend for the Pentax D FA 645 25mm F4:
Lens Mounts
The Fujifilm 23mm F2 WR has the Fujifilm X lens mount whereas the Pentax D FA 645 25mm F4 has the Pentax 645AF2 lens mount. Some of the latest released cameras that are compatible with these mounts are Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount and Pentax 645Z, Pentax 645D and for the Pentax 645AF2 Mount.
Focal Range
Fujifilm 23mm F2 WR is a prime lens with fixed focal lenght of 23mm which has an effective (full-frame 35mm equivalent) focal range of
34.5mm when used on a APS-C / DX format camera.
On the other hand, the Pentax D FA 645 25mm F4 is a prime lens with fixed focal lenght of 25mm.
