The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Panasonic 7-14mm F4 ASPH and the OM System 12-40mm F2.8 PRO II 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. OM System 12-40mm F2.8 PRO II is the longer of the two lenses at 84mm. The Panasonic 7-14mm F4 ASPH with a length of 83mm, is 1mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 70mm.
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 7-14mm F4 ASPH weighs 300g, which means it is 82g (21%) lighter than the OM System 12-40mm F2.8 PRO II which has a weight of 382g.
Lens Mounts
Both the Panasonic 7-14mm F4 ASPH and the OM System 12-40mm F2.8 PRO II 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-3 Astro, OM System OM-5 II and OM System OM-3.
Focal Range
Panasonic 7-14mm F4 ASPH has a focal range of 7-14mm and
2.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
14-28mm when used on a FourThirds format camera.
On the other hand, the OM System 12-40mm F2.8 PRO II has a focal range of 12-40mm and 3.3X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 24-80mm when used on a FourThirds format camera.
