The type of photography that you are planning to use is an important decision factor. Here we have evaluated the HD Pentax-DA 10-17mm F3.5-4.5 ED fisheye and the Fujifilm 27mm F2.8 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. HD Pentax-DA 10-17mm F3.5-4.5 ED fisheye is the longer of the two lenses at 70mm. The Fujifilm 27mm F2.8 with a length of 23mm, is 47mm shorter. Besides being longer, the HD Pentax-DA 10-17mm F3.5-4.5 ED fisheye also has a larger diameter of 68mm compared to the Fujifilm 27mm F2.8's 61mm 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 27mm F2.8 weighs 78g, 75% (239g) lighter than the HD Pentax-DA 10-17mm F3.5-4.5 ED fisheye's weight of 317g.
Lens Mounts
The HD Pentax-DA 10-17mm F3.5-4.5 ED fisheye has the Pentax KAF lens mount whereas the Fujifilm 27mm F2.8 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
HD Pentax-DA 10-17mm F3.5-4.5 ED fisheye has a focal range of 10-17mm and
1.7X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
15-25.5mm when used on a APS-C / DX format camera.
On the other hand, the Fujifilm 27mm F2.8 is a prime lens with fixed focal lenght of 27mm which has an effective (full-frame 35mm equivalent) focal range of 40.5mm when used on a APS-C / DX format camera.
