The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Olympus 25mm F1.2 Pro and the Panasonic Leica 25mm F1.4 for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Olympus 25mm F1.2 Pro is the longer of the two lenses at 87mm. The Panasonic Leica 25mm F1.4 with a length of 55mm, is 32mm shorter. Besides being longer, the Olympus 25mm F1.2 Pro also has a larger diameter of 70mm compared to the Panasonic Leica 25mm F1.4's 63mm diameter.
The weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Panasonic Leica 25mm F1.4 weighs 200g, 51% (210g) lighter than the Olympus 25mm F1.2 Pro's weight of 410g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Micro Four Thirds Mount for size comparison purposes.
Standard Prime Lenses in Micro Four Thirds Mount for Size Comparison
Lens Mounts
Both the Olympus 25mm F1.2 Pro and the Panasonic Leica 25mm F1.4 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-5, Panasonic GH6 and OM System OM-1.
Panasonic Leica 25mm F1.4 is also available in Four Thirds mount.
Focal Range
Both lenses have the same focal range of 25mm but while Olympus 25mm F1.2 Pro has the fastest aperture of F1.2, the Panasonic Leica 25mm F1.4's widest aperture value is F1.4.