The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Olympus 300mm F4 IS Pro and the Samyang 300mm f6.3 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 300mm F4 IS Pro is the longer of the two lenses at 227mm. The Samyang 300mm f6.3 with a length of 74mm, is 153mm shorter. Besides being longer, the Olympus 300mm F4 IS Pro also has a larger diameter of 93mm compared to the Samyang 300mm f6.3's 65mm 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. Samyang 300mm f6.3 weighs 318g, 74% (952g) lighter than the Olympus 300mm F4 IS Pro's weight of 1270g.
Below you can find the dimension and weight table of the Telephoto Prime Lenses in Micro Four Thirds Mount for size comparison purposes.
Super Telephoto Lenses in Micro Four Thirds Mount for Size Comparison
Lens Mounts
Both the Olympus 300mm F4 IS Pro and the Samyang 300mm f6.3 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-1 II, Panasonic G9 II and OM System OM-5.
Samyang 300mm f6.3 is also available in Canon EF-M , Fujifilm X and Sony E mounts.
Focal Range
Both lenses have the same focal range of
300mm but while Olympus 300mm F4 IS Pro has the fastest aperture of
F4.0, the Samyang 300mm f6.3's widest aperture value is
F6.3.