Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Olympus ED 8mm F1.8 Fisheye PRO is the longer of the two lenses at 80mm. The Olympus 9mm F8 Fish-Eye with a length of 13mm is 67mm shorter. Besides being longer, the Olympus ED 8mm F1.8 Fisheye PRO also has a larger diameter of 62mm compared to Olympus 9mm F8 Fish-Eye 's 56mm 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. Olympus 9mm F8 Fish-Eye weighs 30g, 946% (284g) lighter than the Olympus ED 8mm F1.8 Fisheye PRO's weight of 314g.
Below you can find the dimension and weight table of the 'Wideangle Fisheye Prime Lenses in Micro Four Thirds Mount for size comparison purposes.
Wideangle Fisheye Prime Lenses in Micro Four Thirds Mount for Size Comparison
Both Olympus ED 8mm F1.8 Fisheye PRO and Olympus 9mm F8 Fish-Eye has the same Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with the Micro Four Thirds lenses are Panasonic GH6, OM System OM-1 and Panasonic GH5 II.
Olympus ED 8mm F1.8 Fisheye PRO is a prime lens with fixed focal lenght of 8mm which has a 35mm equivalent focal range of 16mm when used on a FourThirds format camera. Olympus 9mm F8 Fish-Eye is a prime lens with fixed focal lenght of 9mm which has a 35mm equivalent focal range of 16mm when used on a FourThirds format camera.