The type of photography that you are planning to use is an important decision factor. Here we have evaluated the OM System 17mm F1.8 II and the OM ED 20mm F1.4 Pro 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 OM System 17mm F1.8 II with a length of 36mm, is 26mm shorter. Besides being longer, the OM ED 20mm F1.4 Pro also has a larger diameter of 63mm compared to the OM System 17mm F1.8 II's 58mm diameter.
Below you can find a scaled side-by-side image of OM System 17mm F1.8 II and OM ED 20mm F1.4 Pro to get a better idea of how their sizes compare in real life.
Comparison image of the OM System 17mm F1.8 II and the OM ED 20mm F1.4 Pro 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. OM System 17mm F1.8 II weighs 112g, which means it is 135g (54%) lighter than the OM ED 20mm F1.4 Pro which has a weight of 247g.
Filter Threads
The OM System 17mm F1.8 II has a filter size of 46mm whereas the OM ED 20mm F1.4 Pro has a 58mm 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 OM System 17mm F1.8 II:
And these are the 58mm filters that we recommend for the OM ED 20mm F1.4 Pro:
Lens Mounts
Both the OM System 17mm F1.8 II and the OM ED 20mm F1.4 Pro 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 System 17mm F1.8 II is a prime lens with fixed focal lenght of 17mm which has an effective (full-frame 35mm equivalent) focal range of
34mm when used on a FourThirds format camera.
On the other hand, the 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.
