The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 50-300mm F4.5-6.3 and the Tamron SP 35mm F1.4 Di USD 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. Tamron 50-300mm F4.5-6.3 weighs 665g, which means it is 140g (17%) lighter than the Tamron SP 35mm F1.4 Di USD which has a weight of 805g.
Filter Threads
The Tamron 50-300mm F4.5-6.3 has a filter size of 67mm whereas the Tamron SP 35mm F1.4 Di USD has a 72mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Tamron 50-300mm F4.5-6.3:
And these are the 72mm filters that we recommend for the Tamron SP 35mm F1.4 Di USD:
Lens Mounts
The Tamron 50-300mm F4.5-6.3 has the Sony E lens mount whereas the Tamron SP 35mm F1.4 Di USD has the Nikon F (FX) 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 Nikon D6, Nikon D780 and Nikon D3500 for the Nikon F (FX) Mount.
Tamron SP 35mm F1.4 Di USD is also available in Canon EF mount.
Focal Range
Tamron 50-300mm F4.5-6.3 has a focal range of 50-300mm and
6.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
75 - 450mm.
On the other hand, the 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 1.5x crop, it provides a 35mm (FF) equivalent of 52.5mm.