The type of photography that you are planning to use is an important decision factor. Here we have evaluated the PENTAX28-105mm F3.5-5.6 WR and the Pentax 16-85mm F3.5-5.6 ED DC 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. Pentax 16-85mm F3.5-5.6 ED DC WR is the longer of the two lenses at 94mm. The PENTAX28-105mm F3.5-5.6 WR with a length of 87mm, is 7mm shorter. Besides being longer, the Pentax 16-85mm F3.5-5.6 ED DC WR also has a larger diameter of 78mm compared to the PENTAX28-105mm F3.5-5.6 WR's 73mm diameter.
Below you can find a scaled side-by-side image of PENTAX28-105mm F3.5-5.6 WR and Pentax 16-85mm F3.5-5.6 ED DC WR to get a better idea of how their sizes compare in real life.
Comparison image of the PENTAX28-105mm F3.5-5.6 WR and the Pentax 16-85mm F3.5-5.6 ED DC 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, which means it is 48g (9%) lighter than the Pentax 16-85mm F3.5-5.6 ED DC WR which has a weight of 488g.
Below you can find the dimension and weight table of the Standard Zoom Lenses in Pentax KAF3 Mount for size comparison purposes.
Standard Pentax KAF3 Mount
Filter Threads
The PENTAX28-105mm F3.5-5.6 WR has a filter size of 62mm whereas the Pentax 16-85mm F3.5-5.6 ED DC WR has a 72mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the PENTAX28-105mm F3.5-5.6 WR:
And these are the 72mm filters that we recommend for the Pentax 16-85mm F3.5-5.6 ED DC WR:
Lens Mounts
Both the PENTAX28-105mm F3.5-5.6 WR and the Pentax 16-85mm F3.5-5.6 ED DC WR has the same Pentax KAF3 lens mount . Some of the latest released cameras that are compatible with the Pentax KAF3 lenses are Pentax K-3 III Mono , Pentax KF and Pentax K-3 III .
Focal Range
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 .
On the other hand, the Pentax 16-85mm F3.5-5.6 ED DC WR has a focal range of 16-85mm and 5.3X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 24-127.5mm when used on a APS-C / DX format camera.
