The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 10mm f2.8 and the Olympus ED 9-18mm f4.0-5.6 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. Samyang 10mm f2.8 is the longer of the two lenses at 77mm. The Olympus ED 9-18mm f4.0-5.6 with a length of 73mm, is 4mm shorter. Besides being longer, the Samyang 10mm f2.8 also has a larger diameter of 86mm compared to the Olympus ED 9-18mm f4.0-5.6's 80mm 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. Olympus ED 9-18mm f4.0-5.6 weighs 280g, 51% (300g) lighter than the Samyang 10mm f2.8's weight of 580g.
Lens Mounts
Both the Samyang 10mm f2.8 and the Olympus ED 9-18mm f4.0-5.6 has the same Four Thirds lens mount. Some of the latest released cameras that are compatible with the Four Thirds lenses are , and .
Samyang 10mm f2.8 is also available in the Canon EF , Canon EF-M, Fujifilm X, Nikon F (DX) and Micro Four Thirds mounts.
Olympus ED 9-18mm f4.0-5.6 is also available in Micro Four Thirds mount.
Focal Range
Samyang 10mm f2.8 is a prime lens with fixed focal lenght of 10mm which has an effective (full-frame 35mm equivalent) focal range of
15mm when used on a APS-C / DX format camera.
On the other hand, the Olympus ED 9-18mm f4.0-5.6 has a focal range of 9-18mm and 2.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 18-36mm when used on a FourThirds format camera.
