The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Panasonic Leica 25mm F1.4 and the Panasonic Leica 15mm F1.7 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. Panasonic Leica 25mm F1.4 is the longer of the two lenses at 55mm. The Panasonic Leica 15mm F1.7 with a length of 36mm, is 19mm shorter. Besides being longer, the Panasonic Leica 25mm F1.4 also has a larger diameter of 63mm compared to the Panasonic Leica 15mm F1.7's 58mm 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. Panasonic Leica 15mm F1.7 weighs 115g, 42% (85g) lighter than the Panasonic Leica 25mm F1.4's weight of 200g.
Filter Threads
Both the Panasonic Leica 25mm F1.4 and the Panasonic Leica 15mm F1.7 have the same Filter thread size of 46mm.
Below are links to the 46mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Panasonic Leica 25mm F1.4 and the Panasonic Leica 15mm F1.7 has the same Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with the Micro Four Thirds lenses are OM System OM-1 II, Panasonic G9 II and OM System OM-5.
Panasonic Leica 25mm F1.4 is also available in Four Thirds mount.
Focal Range
Panasonic Leica 25mm F1.4 is a prime lens with fixed focal lenght of 25mm which has an effective (full-frame 35mm equivalent) focal range of
50mm when used on a FourThirds format camera.
On the other hand, the Panasonic Leica 15mm F1.7 is a prime lens with fixed focal lenght of 15mm which has an effective (full-frame 35mm equivalent) focal range of 30mm when used on a FourThirds format camera.