The Samyang SY300M-C 300mm F6.3 ED UMC CS Mirror Lens for Canon M Cameras is a compact reflex mirror lens suitable for wildlife and landscape photography and astrophotography. This mirror less cameras with APS-C sensors. This mirrorless cameras works for Canon M. Optical construction features 8 lenses in 8 groups providing exceptional image quality and contrast by reducing color aberration. Ultra Multi Coating (UMC) helps reducing ghosting and flare as much as possible.
This lens is a manual lens with smooth manual focusing. Due to the long focal length, it is recommended to focus with live-view to achieve accurate focus. As with all long telephoto lenses a combination of sturdy camera support, substantial tripod, good technique, fast shutter speed, use of remote and mirror lock up are recommended to avoid camera shake to achieve the best results. Filter diameter is 58mm in front and 25.5mm for rear.
Reflex mirror lens
It is a reflex mirror lens with a relatively compact size in such focal length.
Ultra Multi Coating (UMC) of Samyang Optics
Ultra Multi Coating of Samyang Optics is used to minimize flare and ghost and realize crisp color image.
Low dispersion lens (ED) for mirror less
ED lens is used for mirrorless mount lens to lower unnecessary light dispersion to effectively drop color aberration.