The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Panasonic 14mm F2.5 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 a crucial factor to consider when comparing two lenses. Panasonic DG 12mm F1.4 is the longer of the two lenses at 70mm. The Panasonic 14mm F2.5 ASPH with a length of 21mm, is 49mm shorter. Besides being longer, the Panasonic DG 12mm F1.4 also has a larger diameter of 70mm compared to the Panasonic 14mm F2.5 ASPH'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. Panasonic 14mm F2.5 ASPH weighs 55g, which means it is 280g (83%) 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 Lenses in Micro Four Thirds Mount for Size Comparison
Filter Threads
The Panasonic 14mm F2.5 ASPH has a filter size of 46mm whereas the Panasonic DG 12mm F1.4 has a 62mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 46mm filters that we recommend you to consider for the Panasonic 14mm F2.5 ASPH:
And these are the 62mm filters that we recommend for the Panasonic DG 12mm F1.4:
Lens Mounts
Both the Panasonic 14mm F2.5 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-1 II, Panasonic G9 II and OM System OM-5.
Focal Range
Panasonic 14mm F2.5 ASPH is a prime lens with fixed focal lenght of 14mm which has an effective (full-frame 35mm equivalent) focal range of
28mm when used on a FourThirds format camera.
On the other hand, the 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.