The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Olympus 30mm F3.5 Macro and the Sigma 30mm F2.8 DN for their suitability to various photography scenarios:
Size and Weight Comparison
The weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Olympus 30mm F3.5 Macro weighs 128g, which means it is 7g (5%) lighter than the Sigma 30mm F2.8 DN which has a weight of 135g.
Lens Mounts
Both the Olympus 30mm F3.5 Macro and the Sigma 30mm 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-5, Panasonic GH6 and OM System OM-1.
Sigma 30mm F2.8 DN is also available in Sony E mount.
Focal Range
Both lenses have the same focal range of 30mm but while Olympus 30mm F3.5 Macro has the fastest aperture of F3.5, the Sigma 30mm F2.8 DN's widest aperture value is F2.8.