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 Olympus ED 75mm f1.8 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. Olympus ED 75mm f1.8 is the longer of the two lenses at 69mm. The OM ED 20mm F1.4 Pro with a length of 62mm, is 7mm shorter. Besides being longer, the Olympus ED 75mm f1.8 also has a larger diameter of 64mm compared to the OM ED 20mm F1.4 Pro's 63mm diameter.
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 ED 20mm F1.4 Pro weighs 247g, which means it is 58g (19%) lighter than the Olympus ED 75mm f1.8 which has a weight of 305g.
Filter Threads
Both the OM ED 20mm F1.4 Pro and the Olympus ED 75mm f1.8 have the same Filter thread size of 58mm.
Below are links to the 58mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the OM ED 20mm F1.4 Pro and the Olympus ED 75mm f1.8 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 Olympus ED 75mm f1.8 is a prime lens with fixed focal lenght of 75mm which has an effective (full-frame 35mm equivalent) focal range of 150mm when used on a FourThirds format camera.
