The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 50mm F1.4 DG DN Art and the Tamron 45mm F1.8 Di VC 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. Sigma 50mm F1.4 DG DN Art is the longer of the two lenses at 110mm. The Tamron 45mm F1.8 Di VC USD with a length of 92mm, is 18mm shorter. On the other hand, the Tamron 45mm F1.8 Di VC USD has a larger diameter of 80mm compared to the Sigma 50mm F1.4 DG DN Art's 78mm 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 45mm F1.8 Di VC USD weighs 540g, 19% (129g) lighter than the Sigma 50mm F1.4 DG DN Art's weight of 669g.
Filter Threads
The Sigma 50mm F1.4 DG DN Art has a filter size of 72mm whereas the Tamron 45mm F1.8 Di VC USD 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 72mm filters that we recommend you to consider for the Sigma 50mm F1.4 DG DN Art:
And these are the 67mm filters that we recommend for the Tamron 45mm F1.8 Di VC USD:
Lens Mounts
The Sigma 50mm F1.4 DG DN Art has the Sony E lens mount whereas the Tamron 45mm F1.8 Di VC USD has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount and Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K for the Canon EF Mount.
Sigma 50mm F1.4 DG DN Art is also available in the Leica L mount.
Tamron 45mm F1.8 Di VC USD is also available in Nikon F (FX) and Sony Alpha mounts.
Focal Range
Sigma 50mm F1.4 DG DN Art is a prime lens with fixed focal lenght of 50mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
75mm.
On the other hand, the Tamron 45mm F1.8 Di VC USD is a prime lens with fixed focal lenght of 45mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 72mm.
