The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang AF 75mm F1.8 FE and the Canon MP-E 65mm f2.5 1-5x 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. Canon MP-E 65mm f2.5 1-5x Macro is the longer of the two lenses at 98mm. The Samyang AF 75mm F1.8 FE with a length of 69mm, is 29mm shorter. Besides being longer, the Canon MP-E 65mm f2.5 1-5x Macro also has a larger diameter of 81mm compared to the Samyang AF 75mm F1.8 FE'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 AF 75mm F1.8 FE weighs 230g, which means it is 480g (67%) lighter than the Canon MP-E 65mm f2.5 1-5x Macro which has a weight of 710g.
Filter Threads
Both the Samyang AF 75mm F1.8 FE and the Canon MP-E 65mm f2.5 1-5x Macro have the same Filter thread size of 58mm.
Below are links to the 58mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Samyang AF 75mm F1.8 FE has the Sony E lens mount whereas the Canon MP-E 65mm f2.5 1-5x Macro has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Sony A9 III, Sony A7C Mark II and Sony A7CR for the Sony E Mount and Canon 1D X III, Canon 6D MII and Canon 5D MIV for the Canon EF Mount.
Focal Range
Samyang AF 75mm F1.8 FE is a prime lens with fixed focal lenght of 75mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
112.5mm.
On the other hand, the Canon MP-E 65mm f2.5 1-5x Macro is a prime lens with fixed focal lenght of 65mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 104mm.