The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 10-20mm F3.5 EX DC HSM and the Samsung D-Xenon 12-24mm F4 ED for their suitability to various photography scenarios:
Size and Weight Comparison
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. Samsung D-Xenon 12-24mm F4 ED weighs 430g, 17% (90g) lighter than the Sigma 10-20mm F3.5 EX DC HSM's weight of 520g.
Filter Threads
The Sigma 10-20mm F3.5 EX DC HSM has a filter size of 82mm whereas the Samsung D-Xenon 12-24mm F4 ED has a 77mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 82mm filters that we recommend you to consider for the Sigma 10-20mm F3.5 EX DC HSM:
And these are the 77mm filters that we recommend for the Samsung D-Xenon 12-24mm F4 ED:
Lens Mounts
The Sigma 10-20mm F3.5 EX DC HSM has the Pentax KAF3 lens mount whereas the Samsung D-Xenon 12-24mm F4 ED has the Pentax KAF2 lens mount. Some of the latest released cameras that are compatible with these mounts are , and for the Pentax KAF3 Mount and , and for the Pentax KAF2 Mount.
Sigma 10-20mm F3.5 EX DC HSM is also available in Canon EF , Sony Alpha, Sigma SA and Nikon F (DX) mounts.
Focal Range
Sigma 10-20mm F3.5 EX DC HSM has a focal range of 10-20mm and
2.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
15-30mm when used on a APS-C / DX format camera.
On the other hand, the Samsung D-Xenon 12-24mm F4 ED has a focal range of 12-24mm and 2.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 18-36mm when used on a APS-C / DX format camera.