The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 12mm f1.4 and the Panasonic 9mm F1.7 ASPH 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. Sigma 12mm f1.4 is the longer of the two lenses at 69mm. The Panasonic 9mm F1.7 ASPH with a length of 52mm, is 17mm shorter. Besides being longer, the Sigma 12mm f1.4 also has a larger diameter of 68mm compared to the Panasonic 9mm F1.7 ASPH's 61mm diameter.
Below you can find a scaled side-by-side image of Sigma 12mm f1.4 and Panasonic 9mm F1.7 ASPH to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 12mm f1.4 and the Panasonic 9mm F1.7 ASPH Size and Weight 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 9mm F1.7 ASPH weighs 130g, 42% (95g) lighter than the Sigma 12mm f1.4's weight of 225g.
Filter Threads
The Sigma 12mm f1.4 has a filter size of 62mm whereas the Panasonic 9mm F1.7 ASPH has a 55mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the Sigma 12mm f1.4:
And these are the 55mm filters that we recommend for the Panasonic 9mm F1.7 ASPH:
Lens Mounts
The Sigma 12mm f1.4 has the Sony E lens mount whereas the Panasonic 9mm F1.7 ASPH has the Micro Four Thirds lens mount . Some of the latest released cameras that are compatible with these mounts are Sony ZV-E10 II , Sony A6700 and Sony FX30 for the Sony E Mount and OM System OM-3 Astro , OM System OM-5 II and OM System OM-3 for the Micro Four Thirds Mount.
Fujifilm X and Canon RF mounts.
Focal Range
Sigma 12mm f1.4 is a prime lens with fixed focal lenght of 12mm which has an effective (full-frame 35mm equivalent) focal range of
18mm when used on a APS-C / DX format camera.
On the other hand, the 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.
