The type of photography that you are planning to use is an important decision factor. Here we have evaluated the OM System 90mm F3.5 Macro and the Samyang MF 85mm F1.4 Mk2 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 System 90mm F3.5 Macro is the longer of the two lenses at 136mm. The Samyang MF 85mm F1.4 Mk2 with a length of 75mm, is 61mm shorter. On the other hand, the Samyang MF 85mm F1.4 Mk2 has a larger diameter of 78mm compared to the OM System 90mm F3.5 Macro's 70mm 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 System 90mm F3.5 Macro weighs 453g, which means it is 95g (17%) lighter than the Samyang MF 85mm F1.4 Mk2 which has a weight of 548g.
Filter Threads
The OM System 90mm F3.5 Macro has a filter size of 62mm whereas the Samyang MF 85mm F1.4 Mk2 has a 72mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the OM System 90mm F3.5 Macro:
And these are the 72mm filters that we recommend for the Samyang MF 85mm F1.4 Mk2:
Lens Mounts
Both the OM System 90mm F3.5 Macro and the Samyang MF 85mm F1.4 Mk2 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 MF 85mm F1.4 Mk2 is also available in Canon EF , Canon EF-M, Fujifilm X, Nikon F (FX) and Sony E mounts.
Focal Range
OM System 90mm F3.5 Macro is a prime lens with fixed focal lenght of 90mm which has an effective (full-frame 35mm equivalent) focal range of
180mm when used on a FourThirds format camera.
On the other hand, the Samyang MF 85mm F1.4 Mk2 is a prime lens with fixed focal lenght of 85mm.