The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 70-300mm F4-5.6 DG and the Tamron 70-300mm f4-5.6 USD 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 70-300mm f4-5.6 USD is the longer of the two lenses at 143mm. The Sigma 70-300mm F4-5.6 DG with a length of 122mm, is 21mm shorter. Besides being longer, the Tamron 70-300mm f4-5.6 USD also has a larger diameter of 82mm compared to the Sigma 70-300mm F4-5.6 DG's 77mm 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. Sigma 70-300mm F4-5.6 DG weighs 550g, which means it is 215g (28%) lighter than the Tamron 70-300mm f4-5.6 USD which has a weight of 765g.
Below you can find the dimension and weight table of the Telephoto Zoom Lenses in Sony Alpha Mount for size comparison purposes.
Telephoto Lenses in Sony Alpha Mount for Size Comparison
Filter Threads
The Sigma 70-300mm F4-5.6 DG has a filter size of 58mm whereas the Tamron 70-300mm f4-5.6 USD 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 58mm filters that we recommend you to consider for the Sigma 70-300mm F4-5.6 DG:
And these are the 62mm filters that we recommend for the Tamron 70-300mm f4-5.6 USD:
Lens Mounts
Both the Sigma 70-300mm F4-5.6 DG and the Tamron 70-300mm f4-5.6 USD has the same Sony Alpha lens mount. Some of the latest released cameras that are compatible with the Sony Alpha lenses are Sony A99 II, Sony A68 and Sony A77 II.
Sigma 70-300mm F4-5.6 DG is also available in Canon EF , Nikon F (FX), Pentax KAF, Sony Alpha, Sigma SA, Canon EF, Nikon F (FX), Pentax KAF and Sigma SA mounts.
Focal Range
Both lenses have the same focal range of
70-300mm and the fastest aperture of
F4.0 - F5.6.