The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Panasonic Leica 15mm F1.7 and the Olympus M 17mm f2.8 Pancake 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. Panasonic Leica 15mm F1.7 is the longer of the two lenses at 36mm. The Olympus M 17mm f2.8 Pancake with a length of 22mm, is 14mm shorter. Besides being longer, the Panasonic Leica 15mm F1.7 also has a larger diameter of 58mm compared to the Olympus M 17mm f2.8 Pancake's 57mm 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. Olympus M 17mm f2.8 Pancake weighs 71g, 38% (44g) lighter than the Panasonic Leica 15mm F1.7's weight of 115g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Micro Four Thirds Mount for size comparison purposes.
Wideangle Prime Lenses in Micro Four Thirds Mount for Size Comparison
Lens Mounts
Both the Panasonic Leica 15mm F1.7 and the Olympus M 17mm f2.8 Pancake 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.
Focal Range
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. Olympus M 17mm f2.8 Pancake is a prime lens with fixed focal lenght of 17mm which has an effective (full-frame 35mm equivalent) focal range of 34mm when used on a FourThirds format camera.