The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Panasonic 14mm F2.5 II ASPH and the Panasonic 12.5mm / F12 for their suitability to various photography scenarios:
Size and Weight Comparison
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 12.5mm / F12 weighs 45g, 18% (10g) lighter than the Panasonic 14mm F2.5 II ASPH's weight of 55g.
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
Both Panasonic 14mm F2.5 II ASPH and Panasonic 12.5mm / F12 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 14mm F2.5 II ASPH is a prime lens with fixed focal lenght of 14mm which has a 35mm equivalent focal range of 28mm when used on a FourThirds format camera. Panasonic 12.5mm / F12 is a prime lens with fixed focal lenght of 13mm which has a 35mm equivalent focal range of 28mm when used on a FourThirds format camera.