The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Leica SL 24-70mm F2.8 and the Tamron AF 28-80mm f3.5-5.6 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. Leica SL 24-70mm F2.8 is the longer of the two lenses at 123mm. The Tamron AF 28-80mm f3.5-5.6 with a length of 70mm, is 53mm shorter. Besides being longer, the Leica SL 24-70mm F2.8 also has a larger diameter of 88mm compared to the Tamron AF 28-80mm f3.5-5.6'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 28-80mm f3.5-5.6 weighs 237g, 72% (619g) lighter than the Leica SL 24-70mm F2.8's weight of 856g.
Filter Threads
The Leica SL 24-70mm F2.8 has a filter size of 82mm whereas the Tamron AF 28-80mm f3.5-5.6 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 82mm filters that we recommend you to consider for the Leica SL 24-70mm F2.8:
And these are the 58mm filters that we recommend for the Tamron AF 28-80mm f3.5-5.6:
Lens Mounts
The Leica SL 24-70mm F2.8 has the Leica L lens mount whereas the Tamron AF 28-80mm f3.5-5.6 has the Sony Alpha 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 Sony A99 II, Sony A68 and Sony A77 II for the Sony Alpha Mount.
Tamron AF 28-80mm f3.5-5.6 is also available in Canon EF , Nikon F (FX) and Pentax KAF mounts.
Focal Range
Leica SL 24-70mm F2.8 has a focal range of 24-70mm and
2.9X zoom ratio .
On the other hand, the Tamron AF 28-80mm f3.5-5.6 has a focal range of 28-80mm and 2.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 42 - 120mm.