The type of photography that you are planning to use is an important decision factor. Here we have evaluated the OM System 40-150mm F4.0 PRO and the Sigma 60mm F2.8 DN 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. OM System 40-150mm F4.0 PRO is the longer of the two lenses at 99mm. The Sigma 60mm F2.8 DN with a length of 56mm, is 43mm shorter. Besides being longer, the OM System 40-150mm F4.0 PRO also has a larger diameter of 69mm compared to the Sigma 60mm F2.8 DN's 61mm 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 60mm F2.8 DN weighs 190g, 50% (192g) lighter than the OM System 40-150mm F4.0 PRO's weight of 382g.
Filter Threads
The OM System 40-150mm F4.0 PRO has a filter size of 62mm whereas the Sigma 60mm F2.8 DN has a 46mm 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 OM System 40-150mm F4.0 PRO:
And these are the 46mm filters that we recommend for the Sigma 60mm F2.8 DN:
Lens Mounts
Both the OM System 40-150mm F4.0 PRO and the Sigma 60mm F2.8 DN has the same Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with the Micro Four Thirds lenses are OM System OM-3 Astro, OM System OM-5 II and OM System OM-3.
Sigma 60mm F2.8 DN is also available in Sony E mount.
Focal Range
OM System 40-150mm F4.0 PRO has a focal range of 40-150mm and
3.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
80-300mm when used on a FourThirds format camera.
On the other hand, the Sigma 60mm F2.8 DN is a prime lens with fixed focal lenght of 60mm which has an effective (full-frame 35mm equivalent) focal range of 90mm when used on a APS-C / DX format camera.
