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 100mm F2.8 Macro 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 100mm F2.8 Macro with a length of 123mm, is 13mm shorter. On the other hand, the Samyang 100mm F2.8 Macro has a larger diameter of 73mm compared to the OM System 90mm F3.5 Macro's 70mm diameter.
Below you can find a scaled side-by-side image of OM System 90mm F3.5 Macro and Samyang 100mm F2.8 Macro to get a better idea of how their sizes compare in real life.
Comparison image of the OM System 90mm F3.5 Macro and the Samyang 100mm F2.8 Macro Size and Weight 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 267g (37%) lighter than the Samyang 100mm F2.8 Macro which has a weight of 720g.
Below you can find the dimension and weight table of the Macro Prime Lenses in Micro Four Thirds Mount for size comparison purposes.
Macro Micro Four Thirds Mount
Filter Threads
The OM System 90mm F3.5 Macro has a filter size of 62mm whereas the Samyang 100mm F2.8 Macro has a 67mm 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 67mm filters that we recommend for the Samyang 100mm F2.8 Macro:
Lens Mounts
Both the OM System 90mm F3.5 Macro and the Samyang 100mm F2.8 Macro 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 .
Canon EF , Fujifilm X , Nikon F (FX) , Pentax KAF , Samsung NX , Sony Alpha 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 100mm F2.8 Macro is a prime lens with fixed focal lenght of 100mm. When it is mounted on an APS-C sensor camera with 2.0x crop, it provides a 35mm (FF) equivalent of 200mm .
