The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 105mm F2.8 EX DG Macro and the Olympus ED 60mm f2.8 Macro 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. Sigma 105mm F2.8 EX DG Macro is the longer of the two lenses at 98mm. The Olympus ED 60mm f2.8 Macro with a length of 82mm, is 16mm shorter. Besides being longer, the Sigma 105mm F2.8 EX DG Macro also has a larger diameter of 74mm compared to the Olympus ED 60mm f2.8 Macro's 56mm 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 60mm f2.8 Macro weighs 186g, 59% (274g) lighter than the Sigma 105mm F2.8 EX DG Macro's weight of 460g.
Filter Threads
The Sigma 105mm F2.8 EX DG Macro has a filter size of 62mm whereas the Olympus ED 60mm f2.8 Macro 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 Sigma 105mm F2.8 EX DG Macro:
And these are the 46mm filters that we recommend for the Olympus ED 60mm f2.8 Macro:
Lens Mounts
The Sigma 105mm F2.8 EX DG Macro has the Four Thirds lens mount whereas the Olympus ED 60mm f2.8 Macro has the Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with these mounts are Olympus E-5, Olympus E-600 and Olympus E-620 for the Four Thirds Mount and OM System OM-3 Astro, OM System OM-5 II and OM System OM-3 for the Micro Four Thirds Mount.
Sigma 105mm F2.8 EX DG Macro is also available in the Canon EF , Nikon F (FX), Pentax KAF, Sony Alpha and Sigma SA mounts.
Focal Range
Sigma 105mm F2.8 EX DG Macro is a prime lens with fixed focal lenght of 105mm.
On the other hand, the Olympus ED 60mm f2.8 Macro is a prime lens with fixed focal lenght of 60mm which has an effective (full-frame 35mm equivalent) focal range of 120mm when used on a FourThirds format camera.
