The type of photography that you are planning to use is an important decision factor. Here we have evaluated the OM System 40-150mm F4.0 PRO and the Samyang 50mm F1.2 AS UMC CS 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 40-150mm F4.0 PRO is the longer of the two lenses at 99mm. The Samyang 50mm F1.2 AS UMC CS with a length of 74mm, is 25mm shorter. Besides being longer, the OM System 40-150mm F4.0 PRO also has a larger diameter of 69mm compared to the Samyang 50mm F1.2 AS UMC CS 's 68mm diameter.
Below you can find a scaled side-by-side image of OM System 40-150mm F4.0 PRO and Samyang 50mm F1.2 AS UMC CS to get a better idea of how their sizes compare in real life.
Comparison image of the OM System 40-150mm F4.0 PRO and the Samyang 50mm F1.2 AS UMC CS 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. Samyang 50mm F1.2 AS UMC CS weighs 375g, 1% (7g) lighter than the OM System 40-150mm F4.0 PRO's weight of 382g.
Filter Threads
Both the OM System 40-150mm F4.0 PRO and the Samyang 50mm F1.2 AS UMC CS have the same Filter thread size of 62mm .
Below are links to the 62mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the OM System 40-150mm F4.0 PRO and the Samyang 50mm F1.2 AS UMC CS 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-M , Fujifilm X and Sony E mounts.
Focal Range
OM System 40-150mm F4.0 PRO has a focal range of 40-150mm and
3.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
80-300mm when used on a FourThirds format camera.
On the other hand, the Samyang 50mm F1.2 AS UMC CS is a prime lens with fixed focal lenght of 50mm which has an effective (full-frame 35mm equivalent) focal range of 100mm when used on a APS-C / DX format camera.
