The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Pentax 15mm F4 ED AL L and the Fujifilm 14mm F2.8 R 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. Fujifilm 14mm F2.8 R is the longer of the two lenses at 58mm. The Pentax 15mm F4 ED AL L with a length of 40mm, is 18mm shorter. Besides being longer, the Fujifilm 14mm F2.8 R also has a larger diameter of 65mm compared to the Pentax 15mm F4 ED AL L's 63mm 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 15mm F4 ED AL L weighs 189g, which means it is 46g (19%) lighter than the Fujifilm 14mm F2.8 R which has a weight of 235g.
Filter Threads
The Pentax 15mm F4 ED AL L has a filter size of 49mm whereas the Fujifilm 14mm F2.8 R 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 49mm filters that we recommend you to consider for the Pentax 15mm F4 ED AL L:
And these are the 58mm filters that we recommend for the Fujifilm 14mm F2.8 R:
Lens Mounts
The Pentax 15mm F4 ED AL L has the Pentax KAF lens mount whereas the Fujifilm 14mm F2.8 R has the Fujifilm X lens mount. Some of the latest released cameras that are compatible with these mounts are Pentax K-3 III Mono, Pentax KF and Pentax K-3 III for the Pentax KAF Mount and Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount.
Focal Range
Pentax 15mm F4 ED AL L is a prime lens with fixed focal lenght of 15mm which has an effective (full-frame 35mm equivalent) focal range of
22.5mm when used on a APS-C / DX format camera.
On the other hand, the Fujifilm 14mm F2.8 R is a prime lens with fixed focal lenght of 14mm which has an effective (full-frame 35mm equivalent) focal range of 21mm when used on a APS-C / DX format camera.
