The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 105mm F2.8 DG DN Macro and the Tamron 90mm F2.8 VC USD 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 VC USD Macro with a length of 115mm, is 19mm shorter. On the other hand, the Tamron 90mm F2.8 VC USD Macro has a larger diameter of 76mm compared to the Sigma 105mm F2.8 DG DN Macro's 74mm 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. Tamron 90mm F2.8 VC USD Macro weighs 550g, 23% (165g) lighter than the Sigma 105mm F2.8 DG DN Macro's weight of 715g.
Filter Threads
The Sigma 105mm F2.8 DG DN Macro has a filter size of 62mm whereas the Tamron 90mm F2.8 VC USD Macro has a 58mm 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 DG DN Macro:
And these are the 58mm filters that we recommend for the Tamron 90mm F2.8 VC USD Macro:
Lens Mounts
The Sigma 105mm F2.8 DG DN Macro has the Sony E lens mount whereas the Tamron 90mm F2.8 VC USD Macro has the Sony Alpha lens mount. Some of the latest released cameras that are compatible with these mounts are Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount and Sony A99 II, Sony A68 and Sony A77 II for the Sony Alpha Mount.
Sigma 105mm F2.8 DG DN Macro is also available in the Leica L mount.
Tamron 90mm F2.8 VC USD Macro is also available in Canon EF and Nikon F (FX) mounts.
Focal Range
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.
On the other hand, the Tamron 90mm F2.8 VC USD Macro 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.
