The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Leica TL 35mm F1.4 ASPH 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 Leica TL 35mm F1.4 ASPH with a length of 77mm, is 63mm shorter. Besides being longer, the Pentax D FA 645 25mm F4 also has a larger diameter of 90mm compared to the Leica TL 35mm F1.4 ASPH's 70mm 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. Leica TL 35mm F1.4 ASPH weighs 428g, which means it is 642g (60%) lighter than the Pentax D FA 645 25mm F4 which has a weight of 1070g.
Filter Threads
The Leica TL 35mm F1.4 ASPH has a filter size of 60mm 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 60mm filters that we recommend you to consider for the Leica TL 35mm F1.4 ASPH:
And these are the 41mm filters that we recommend for the Pentax D FA 645 25mm F4:
Lens Mounts
The Leica TL 35mm F1.4 ASPH has the Leica L 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 , and for the Leica L Mount and Pentax 645Z, Pentax 645D and for the Pentax 645AF2 Mount.
Focal Range
Leica TL 35mm F1.4 ASPH is a prime lens with fixed focal lenght of 35mm which has an effective (full-frame 35mm equivalent) focal range of
52.5mm when used on a APS-C / DX format camera.
On the other hand, the Pentax D FA 645 25mm F4 is a prime lens with fixed focal lenght of 25mm.
