The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 70mm F2.8 DG Macro and the Sigma 50mm 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 70mm F2.8 DG Macro is the longer of the two lenses at 106mm. The Sigma 50mm F2.8 Macro with a length of 67mm, is 39mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 71mm.
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 50mm F2.8 Macro weighs 320g, 37% (195g) lighter than the Sigma 70mm F2.8 DG Macro's weight of 515g.
Below you can find the dimension and weight table of the Macro Prime Lenses in Sigma SA Mount for size comparison purposes.
Macro Lenses in Sigma SA Mount for Size Comparison
Filter Threads
The Sigma 70mm F2.8 DG Macro has a filter size of 49mm whereas the Sigma 50mm F2.8 Macro has a 55mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 49mm filters that we recommend you to consider for the Sigma 70mm F2.8 DG Macro:
And these are the 55mm filters that we recommend for the Sigma 50mm F2.8 Macro:
Lens Mounts
Both the Sigma 70mm F2.8 DG Macro and the Sigma 50mm F2.8 Macro has the same Sigma SA lens mount. Some of the latest released cameras that are compatible with the Sigma SA lenses are Sigma Quattro, Sigma Quattro H and Sigma SD1 Merrill.
Sigma 70mm F2.8 DG Macro is also available in the Canon EF , Nikon F (FX) and Sony E mounts.
Sigma 50mm F2.8 Macro is also available in Canon EF , Pentax KAF, Sony Alpha and Nikon F (FX) mounts.
Focal Range
Sigma 70mm F2.8 DG Macro is a prime lens with fixed focal lenght of 70mm.
On the other hand, the Sigma 50mm F2.8 Macro is a prime lens with fixed focal lenght of 50mm.
