The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 18-50mm F2.8 DC DN C and the Tamron 11-20mm F2.8 A 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. Tamron 11-20mm F2.8 A is the longer of the two lenses at 86mm. The Sigma 18-50mm F2.8 DC DN C with a length of 75mm, is 11mm shorter. Besides being longer, the Tamron 11-20mm F2.8 A also has a larger diameter of 73mm compared to the Sigma 18-50mm F2.8 DC DN C's 65mm diameter.
Below you can find a scaled side-by-side image of Sigma 18-50mm F2.8 DC DN C and Tamron 11-20mm F2.8 A to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 18-50mm F2.8 DC DN C and the Tamron 11-20mm F2.8 A 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. Sigma 18-50mm F2.8 DC DN C weighs 290g, which means it is 45g (13%) lighter than the Tamron 11-20mm F2.8 A which has a weight of 335g.
Filter Threads
The Sigma 18-50mm F2.8 DC DN C has a filter size of 55mm whereas the Tamron 11-20mm F2.8 A has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 55mm filters that we recommend you to consider for the Sigma 18-50mm F2.8 DC DN C:
And these are the 67mm filters that we recommend for the Tamron 11-20mm F2.8 A:
Lens Mounts
Both the Sigma 18-50mm F2.8 DC DN C and the Tamron 11-20mm F2.8 A has the same Sony E lens mount . Some of the latest released cameras that are compatible with the Sony E lenses are Sony ZV-E10 II , Sony A6700 and Sony FX30 .
Leica L and Fujifilm X mounts.
Focal Range
Sigma 18-50mm F2.8 DC DN C has a focal range of 18-50mm and
2.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
27-75mm when used on a APS-C / DX format camera.
On the other hand, the Tamron 11-20mm F2.8 A has a focal range of 11-20mm and 1.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 16.5-30mm when used on a APS-C / DX format camera.
