The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Pentax D FA 150-450mm F4.5-5.6 ED DC AW and the Sigma 50-500mm F4.5-6.3 DG OS HSM 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 D FA 150-450mm F4.5-5.6 ED DC AW is the longer of the two lenses at 242mm. The Sigma 50-500mm F4.5-6.3 DG OS HSM with a length of 219mm, is 23mm shorter. On the other hand, the Sigma 50-500mm F4.5-6.3 DG OS HSM has a larger diameter of 104mm compared to the Pentax D FA 150-450mm F4.5-5.6 ED DC AW's 95mm 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. Sigma 50-500mm F4.5-6.3 DG OS HSM weighs 1970g, 1% (30g) lighter than the Pentax D FA 150-450mm F4.5-5.6 ED DC AW's weight of 2000g.
Filter Threads
The Pentax D FA 150-450mm F4.5-5.6 ED DC AW has a filter size of 86mm whereas the Sigma 50-500mm F4.5-6.3 DG OS HSM has a 95mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 86mm filters that we recommend you to consider for the Pentax D FA 150-450mm F4.5-5.6 ED DC AW:
And these are the 95mm filters that we recommend for the Sigma 50-500mm F4.5-6.3 DG OS HSM:
Lens Mounts
The Pentax D FA 150-450mm F4.5-5.6 ED DC AW has the Pentax KAF3 lens mount whereas the Sigma 50-500mm F4.5-6.3 DG OS HSM has the Canon EF 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 KAF3 Mount and Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K for the Canon EF Mount.
Sigma 50-500mm F4.5-6.3 DG OS HSM is also available in Pentax KAF3 , Sony Alpha, Sigma SA and Nikon F (FX) mounts.
Focal Range
Pentax D FA 150-450mm F4.5-5.6 ED DC AW has a focal range of 150-450mm and
3.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
225 - 675mm.
On the other hand, the Sigma 50-500mm F4.5-6.3 DG OS HSM has a focal range of 50-500mm and 10.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 80 - 800mm.
