The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 150-600mm f5-6.3 VC and the Sony 135mm F2.8 (T4.5) STF 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 150-600mm f5-6.3 VC is the longer of the two lenses at 258mm. The Sony 135mm F2.8 (T4.5) STF with a length of 99mm, is 159mm shorter. Besides being longer, the Tamron 150-600mm f5-6.3 VC also has a larger diameter of 106mm compared to the Sony 135mm F2.8 (T4.5) STF's 80mm 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. Sony 135mm F2.8 (T4.5) STF weighs 730g, 62% (1221g) lighter than the Tamron 150-600mm f5-6.3 VC's weight of 1951g.
Filter Threads
The Tamron 150-600mm f5-6.3 VC has a filter size of 95mm whereas the Sony 135mm F2.8 (T4.5) STF 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 95mm filters that we recommend you to consider for the Tamron 150-600mm f5-6.3 VC:
And these are the 72mm filters that we recommend for the Sony 135mm F2.8 (T4.5) STF:
Lens Mounts
Both the Tamron 150-600mm f5-6.3 VC and the Sony 135mm F2.8 (T4.5) STF 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.
Tamron 150-600mm f5-6.3 VC is also available in Canon EF and Nikon F (FX) mounts.
Focal Range
Tamron 150-600mm f5-6.3 VC has a focal range of 150-600mm and
4.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
225 - 900mm.
On the other hand, the Sony 135mm F2.8 (T4.5) STF is a prime lens with fixed focal lenght of 135mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 202.5mm.