The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Olympus ED 8-25mm F4 Pro and the Sigma 10-20mm F3.5 EX DC 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. Olympus ED 8-25mm F4 Pro is the longer of the two lenses at 89mm. The Sigma 10-20mm F3.5 EX DC HSM with a length of 88mm, is 1mm shorter. On the other hand, the Sigma 10-20mm F3.5 EX DC HSM has a larger diameter of 87mm compared to the Olympus ED 8-25mm F4 Pro's 77mm 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. Olympus ED 8-25mm F4 Pro weighs 411g, which means it is 109g (20%) lighter than the Sigma 10-20mm F3.5 EX DC HSM which has a weight of 520g.
Filter Threads
The Olympus ED 8-25mm F4 Pro has a filter size of 72mm whereas the Sigma 10-20mm F3.5 EX DC HSM has a 82mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 72mm filters that we recommend you to consider for the Olympus ED 8-25mm F4 Pro:
And these are the 82mm filters that we recommend for the Sigma 10-20mm F3.5 EX DC HSM:
Lens Mounts
The Olympus ED 8-25mm F4 Pro has the Micro Four Thirds lens mount whereas the Sigma 10-20mm F3.5 EX DC HSM has the Nikon F (DX) 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 Nikon D3500, Nikon D7500 and Nikon D5600 for the Nikon F (DX) Mount.
Sigma 10-20mm F3.5 EX DC HSM is also available in Canon EF , Pentax KAF3, Sony Alpha and Sigma SA mounts.
Focal Range
Olympus ED 8-25mm F4 Pro has a focal range of 8-25mm and
3.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
16-50mm when used on a FourThirds format camera.
On the other hand, the 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.
