The type of photography that you are planning to use is an important decision factor. Here we have evaluated the OM ED 20mm F1.4 Pro and the Panasonic 42.5mm F1.7 OIS 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 ED 20mm F1.4 Pro is the longer of the two lenses at 62mm. The Panasonic 42.5mm F1.7 OIS with a length of 50mm, is 12mm shorter. Besides being longer, the OM ED 20mm F1.4 Pro also has a larger diameter of 63mm compared to the Panasonic 42.5mm F1.7 OIS's 55mm diameter.
Below you can find a scaled side-by-side image of OM ED 20mm F1.4 Pro and Panasonic 42.5mm F1.7 OIS to get a better idea of how their sizes compare in real life.
Comparison image of the OM ED 20mm F1.4 Pro and the Panasonic 42.5mm F1.7 OIS 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 42.5mm F1.7 OIS weighs 130g, 47% (117g) lighter than the OM ED 20mm F1.4 Pro's weight of 247g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Micro Four Thirds Mount for size comparison purposes.
Standard Micro Four Thirds Mount
Filter Threads
The OM ED 20mm F1.4 Pro has a filter size of 58mm whereas the Panasonic 42.5mm F1.7 OIS has a 37mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 58mm filters that we recommend you to consider for the OM ED 20mm F1.4 Pro:
And these are the 37mm filters that we recommend for the Panasonic 42.5mm F1.7 OIS:
Lens Mounts
Both the OM ED 20mm F1.4 Pro and the Panasonic 42.5mm F1.7 OIS 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
OM ED 20mm F1.4 Pro is a prime lens with fixed focal lenght of 20mm which has an effective (full-frame 35mm equivalent) focal range of
40mm when used on a FourThirds format camera.
On the other hand, the Panasonic 42.5mm F1.7 OIS is a prime lens with fixed focal lenght of 43mm which has an effective (full-frame 35mm equivalent) focal range of 86mm when used on a FourThirds format camera.
