The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 90mm F2.8 Di III and the Sigma 105mm F2.8 DG DN 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 DG DN Macro is the longer of the two lenses at 134mm. The Tamron 90mm F2.8 Di III with a length of 126mm, is 8mm shorter. On the other hand, the Tamron 90mm F2.8 Di III has a larger diameter of 79mm compared to the Sigma 105mm F2.8 DG DN Macro's 74mm diameter.
Below you can find a scaled side-by-side image of Tamron 90mm F2.8 Di III and Sigma 105mm F2.8 DG DN Macro to get a better idea of how their sizes compare in real life.
Comparison image of the Tamron 90mm F2.8 Di III and the Sigma 105mm F2.8 DG DN Macro Size and Weight 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. Tamron 90mm F2.8 Di III weighs 630g, which means it is 85g (11%) lighter than the Sigma 105mm F2.8 DG DN Macro which has a weight of 715g.
Filter Threads
The Tamron 90mm F2.8 Di III has a filter size of 67mm whereas the Sigma 105mm F2.8 DG DN Macro has a 62mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Tamron 90mm F2.8 Di III:
And these are the 62mm filters that we recommend for the Sigma 105mm F2.8 DG DN Macro:
Lens Mounts
Both the Tamron 90mm F2.8 Di III and the Sigma 105mm F2.8 DG DN Macro has the same Sony E lens mount . Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX5 , Sony A7R VI and Sony A7 V .
Leica L mount.
Focal Range
Tamron 90mm F2.8 Di III is a prime lens with fixed focal lenght of 90mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
135mm .
On the other hand, the Sigma 105mm F2.8 DG DN Macro is a prime lens with fixed focal lenght of 105mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 157.5mm .
