The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Panasonic 12.5mm / F12 and the Olympus 15mm F8.0 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 12.5mm / F12 is the longer of the two lenses at 21mm. The Olympus 15mm F8.0 with a length of 9mm, is 12mm shorter. Besides being longer, the Panasonic 12.5mm / F12 also has a larger diameter of 75mm compared to the Olympus 15mm F8.0's 56mm 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. Olympus 15mm F8.0 weighs 22g, 51% (23g) lighter than the Panasonic 12.5mm / F12's weight of 45g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Micro Four Thirds Mount for size comparison purposes.
Wideangle Lenses in Micro Four Thirds Mount for Size Comparison
Lens Mounts
Both the Panasonic 12.5mm / F12 and the Olympus 15mm F8.0 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.
Focal Range
Panasonic 12.5mm / F12 is a prime lens with fixed focal lenght of 13mm which has an effective (full-frame 35mm equivalent) focal range of
26mm when used on a FourThirds format camera.
On the other hand, the Olympus 15mm F8.0 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.