The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 16mm F1.4 DC DN MFT and the Panasonic 12.5mm / F12 for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Sigma 16mm F1.4 DC DN MFT is the longer of the two lenses at 92mm. The Panasonic 12.5mm / F12 with a length of 21mm is 71mm shorter. On the other hand, the Panasonic 12.5mm / F12 has a larger diameter of 75mm compared to Sigma 16mm F1.4 DC DN MFT's 72mm diameter.
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, 88% (360g) lighter than the Sigma 16mm F1.4 DC DN MFT's weight of 405g.
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
Lens Mounts
Both Sigma 16mm F1.4 DC DN MFT 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.
Focal Range
Sigma 16mm F1.4 DC DN MFT is a prime lens with fixed focal lenght of 16mm which has an effective (full-frame 35mm equivalent) focal range of 32mm when used on a FourThirds format camera. 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.