The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 85mm F1.4 DG DN and the Pentax-D FA 85mm F1.4 ED SDM AW 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. Pentax-D FA 85mm F1.4 ED SDM AW is the longer of the two lenses at 124mm. The Sigma 85mm F1.4 DG DN with a length of 94mm, is 30mm shorter. Besides being longer, the Pentax-D FA 85mm F1.4 ED SDM AW also has a larger diameter of 95mm compared to the Sigma 85mm F1.4 DG DN 's 83mm diameter.
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Below you can find a scaled side-by-side image of Sigma 85mm F1.4 DG DN and Pentax-D FA 85mm F1.4 ED SDM AW to get a better idea of how their sizes compare in real life.
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. Sigma 85mm F1.4 DG DN weighs 630g, which means it is 625g (49%) lighter than the Pentax-D FA 85mm F1.4 ED SDM AW which has a weight of 1255g.
Filter Threads
The Sigma 85mm F1.4 DG DN has a filter size of 77mm whereas the Pentax-D FA 85mm F1.4 ED SDM AW has a 82mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 77mm filters that we recommend you to consider for the Sigma 85mm F1.4 DG DN :
And these are the 82mm filters that we recommend for the Pentax-D FA 85mm F1.4 ED SDM AW:
Lens Mounts
The Sigma 85mm F1.4 DG DN has the Sony E lens mount whereas the Pentax-D FA 85mm F1.4 ED SDM AW has the Pentax KAF4 lens mount. Some of the latest released cameras that are compatible with these mounts are Sony A9 III, Sony A7C Mark II and Sony A7CR for the Sony E Mount and , and for the Pentax KAF4 Mount.
Focal Range
Both lenses have the same focal range of
85mm and the fastest aperture of
F1.4.