The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Panasonic 9mm F1.7 ASPH and the Panasonic DG 12mm 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. Panasonic DG 12mm F1.4 is the longer of the two lenses at 70mm. The Panasonic 9mm F1.7 ASPH with a length of 52mm, is 18mm shorter. Besides being longer, the Panasonic DG 12mm F1.4 also has a larger diameter of 70mm compared to the Panasonic 9mm F1.7 ASPH's 61mm diameter.
Below you can find a scaled side-by-side image of Panasonic 9mm F1.7 ASPH and Panasonic DG 12mm F1.4 to get a better idea of how their sizes compare in real life.
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 9mm F1.7 ASPH weighs 130g, which means it is 205g (61%) lighter than the Panasonic DG 12mm F1.4 which has a weight of 335g.
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 the Panasonic 9mm F1.7 ASPH and the Panasonic DG 12mm 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 9mm F1.7 ASPH is a prime lens with fixed focal lenght of 9mm which has an effective (full-frame 35mm equivalent) focal range of 18mm when used on a FourThirds format camera. Panasonic DG 12mm F1.4 is a prime lens with fixed focal lenght of 12mm which has an effective (full-frame 35mm equivalent) focal range of 24mm when used on a FourThirds format camera.