The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Olympus ED 7-14mm F2.8 PRO and the PENTAX28-105mm F3.5-5.6 WR 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. Olympus ED 7-14mm F2.8 PRO is the longer of the two lenses at 106mm. The PENTAX28-105mm F3.5-5.6 WR with a length of 87mm, is 19mm shorter. Besides being longer, the Olympus ED 7-14mm F2.8 PRO also has a larger diameter of 79mm compared to the PENTAX28-105mm F3.5-5.6 WR's 73mm diameter.
Below you can find a scaled side-by-side image of Olympus ED 7-14mm F2.8 PRO and PENTAX28-105mm F3.5-5.6 WR to get a better idea of how their sizes compare in real life.
Comparison image of the Olympus ED 7-14mm F2.8 PRO and the PENTAX28-105mm F3.5-5.6 WR Size and Weight 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. PENTAX28-105mm F3.5-5.6 WR weighs 440g, 17% (94g) lighter than the Olympus ED 7-14mm F2.8 PRO's weight of 534g.
Lens Mounts
The Olympus ED 7-14mm F2.8 PRO has the Micro Four Thirds lens mount whereas the PENTAX28-105mm F3.5-5.6 WR has the Pentax KAF3 lens mount . Some of the latest released cameras that are compatible with these mounts are OM System OM-3 Astro , OM System OM-5 II and OM System OM-3 for the Micro Four Thirds Mount and Pentax K-3 III Mono , Pentax KF and Pentax K-3 III for the Pentax KAF3 Mount.
Focal Range
Olympus ED 7-14mm F2.8 PRO has a focal range of 7-14mm and
2.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
14-28mm when used on a FourThirds format camera.
On the other hand, the PENTAX28-105mm F3.5-5.6 WR has a focal range of 28-105mm and 3.8X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 42 - 157.5mm .
