The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron SP 35mm F1.4 Di USD and the Samyang 16mm f2.0 for their suitability to various photography scenarios:
Size and Weight Comparison
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. Samyang 16mm f2.0 weighs 583g, 27% (222g) lighter than the Tamron SP 35mm F1.4 Di USD's weight of 805g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Canon EF Mount for size comparison purposes.
Wideangle Lenses in Canon EF Mount for Size Comparison
Filter Threads
The Tamron SP 35mm F1.4 Di USD has a filter size of 72mm whereas the Samyang 16mm f2.0 has a 77mm 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 Tamron SP 35mm F1.4 Di USD:
And these are the 77mm filters that we recommend for the Samyang 16mm f2.0:
Lens Mounts
Both the Tamron SP 35mm F1.4 Di USD and the Samyang 16mm f2.0 has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K.
Tamron SP 35mm F1.4 Di USD is also available in the Nikon F (FX) mount.
Samyang 16mm f2.0 is also available in Canon EF-M , Fujifilm X, Nikon F (DX), Four Thirds, Micro Four Thirds, Pentax KAF, Sony Alpha, Sony E and Samsung NX mounts.
Focal Range
Tamron SP 35mm F1.4 Di USD is a prime lens with fixed focal lenght of 35mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
56mm.
On the other hand, the Samyang 16mm f2.0 is a prime lens with fixed focal lenght of 16mm which has an effective (full-frame 35mm equivalent) focal range of 25.6mm when used on a APS-C / DX format camera.