The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 28-70mm F2.8 DG DN C and the Tamron AF 28-300mm f3.5-6.3 XR LD 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 28-70mm F2.8 DG DN C is the longer of the two lenses at 102mm. The Tamron AF 28-300mm f3.5-6.3 XR LD with a length of 84mm, is 18mm shorter. On the other hand, the Tamron AF 28-300mm f3.5-6.3 XR LD has a larger diameter of 73mm compared to the Sigma 28-70mm F2.8 DG DN C's 72mm 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 AF 28-300mm f3.5-6.3 XR LD weighs 420g, 10% (50g) lighter than the Sigma 28-70mm F2.8 DG DN C's weight of 470g.
Filter Threads
The Sigma 28-70mm F2.8 DG DN C has a filter size of 67mm whereas the Tamron AF 28-300mm f3.5-6.3 XR LD 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 Sigma 28-70mm F2.8 DG DN C:
And these are the 62mm filters that we recommend for the Tamron AF 28-300mm f3.5-6.3 XR LD:
Lens Mounts
The Sigma 28-70mm F2.8 DG DN C has the Leica L lens mount whereas the Tamron AF 28-300mm f3.5-6.3 XR LD has the Pentax KAF lens mount. Some of the latest released cameras that are compatible with these mounts are Leica SL3-P, Panasonic S1 II and Panasonic S1 IIE for the Leica L Mount and Pentax K-3 III Mono, Pentax KF and Pentax K-3 III for the Pentax KAF Mount.
Tamron AF 28-300mm f3.5-6.3 XR LD is also available in Canon EF , Nikon F (FX) and Sony Alpha mounts.
Focal Range
Sigma 28-70mm F2.8 DG DN C has a focal range of 28-70mm and
2.5X zoom ratio .
On the other hand, the Tamron AF 28-300mm f3.5-6.3 XR LD has a focal range of 28-300mm and 10.7X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 42 - 450mm.
