The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Pentax 18-270mm F3.5-6.3 ED SDM and the Samsung D-Xenon 18-250mm F3.5-6.3 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 18-270mm F3.5-6.3 ED SDM is the longer of the two lenses at 89mm. The Samsung D-Xenon 18-250mm F3.5-6.3 with a length of 86mm, is 3mm shorter. Besides being longer, the Pentax 18-270mm F3.5-6.3 ED SDM also has a larger diameter of 76mm compared to the Samsung D-Xenon 18-250mm F3.5-6.3's 75mm 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 18-270mm F3.5-6.3 ED SDM weighs 453g, which means it is 2g (0%) lighter than the Samsung D-Xenon 18-250mm F3.5-6.3 which has a weight of 455g.
Filter Threads
Both the Pentax 18-270mm F3.5-6.3 ED SDM and the Samsung D-Xenon 18-250mm F3.5-6.3 have the same Filter thread size of 62mm.
Below are links to the 62mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Pentax 18-270mm F3.5-6.3 ED SDM has the Pentax KAF lens mount whereas the Samsung D-Xenon 18-250mm F3.5-6.3 has the Pentax KAF2 lens mount. Some of the latest released cameras that are compatible with these mounts are Pentax K-3 III Monochrome, Pentax KF and Pentax K-3 III for the Pentax KAF Mount and , and for the Pentax KAF2 Mount.
Focal Range
Pentax 18-270mm F3.5-6.3 ED SDM has a focal range of 18-270mm and
15.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
27-405mm when used on a APS-C / DX format camera.
On the other hand, the Samsung D-Xenon 18-250mm F3.5-6.3 has a focal range of 18-250mm and 13.9X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-375mm when used on a APS-C / DX format camera.