The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony FE 24mm F1.4 GM and the Pentax D FA 645 25mm F4 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 645 25mm F4 is the longer of the two lenses at 140mm. The Sony FE 24mm F1.4 GM with a length of 92mm, is 48mm shorter. Besides being longer, the Pentax D FA 645 25mm F4 also has a larger diameter of 90mm compared to the Sony FE 24mm F1.4 GM's 75mm 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 FE 24mm F1.4 GM weighs 445g, which means it is 625g (58%) lighter than the Pentax D FA 645 25mm F4 which has a weight of 1070g.
Filter Threads
The Sony FE 24mm F1.4 GM has a filter size of 67mm whereas the Pentax D FA 645 25mm F4 has a 41mm 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 Sony FE 24mm F1.4 GM:
And these are the 41mm filters that we recommend for the Pentax D FA 645 25mm F4:
Lens Mounts
The Sony FE 24mm F1.4 GM has the Sony E lens mount whereas the Pentax D FA 645 25mm F4 has the Pentax 645AF2 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 Pentax 645Z, Pentax 645D and for the Pentax 645AF2 Mount.
Focal Range
Sony FE 24mm F1.4 GM is a prime lens with fixed focal lenght of 24mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
36mm.
On the other hand, the Pentax D FA 645 25mm F4 is a prime lens with fixed focal lenght of 25mm.
