The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Pentax-D FA 85mm F1.4 ED SDM AW and the Tamron 70-200mm f2.8 LD 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 70-200mm f2.8 LD is the longer of the two lenses at 194mm. The Pentax-D FA 85mm F1.4 ED SDM AW with a length of 124mm, is 70mm shorter. On the other hand, the Pentax-D FA 85mm F1.4 ED SDM AW has a larger diameter of 95mm compared to the Tamron 70-200mm f2.8 LD's 90mm 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. Pentax-D FA 85mm F1.4 ED SDM AW weighs 1255g, which means it is 75g (5%) lighter than the Tamron 70-200mm f2.8 LD which has a weight of 1330g.
Filter Threads
The Pentax-D FA 85mm F1.4 ED SDM AW has a filter size of 82mm whereas the Tamron 70-200mm f2.8 LD 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 82mm filters that we recommend you to consider for the Pentax-D FA 85mm F1.4 ED SDM AW:
And these are the 77mm filters that we recommend for the Tamron 70-200mm f2.8 LD:
Lens Mounts
The Pentax-D FA 85mm F1.4 ED SDM AW has the Pentax KAF4 lens mount whereas the Tamron 70-200mm f2.8 LD has the Pentax KAF lens mount. Some of the latest released cameras that are compatible with these mounts are , and for the Pentax KAF4 Mount and Pentax K-3 III Mono, Pentax KF and Pentax K-3 III for the Pentax KAF Mount.
Tamron 70-200mm f2.8 LD is also available in Canon EF , Nikon F (FX) and Sony Alpha mounts.
Focal Range
Pentax-D FA 85mm F1.4 ED SDM AW is a prime lens with fixed focal lenght of 85mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
127.5mm.
On the other hand, the Tamron 70-200mm f2.8 LD has a focal range of 70-200mm and 2.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 105 - 300mm.
