Rokinon 300M-M-BK 300mm F6.3 Mirror Lens for Canon M Mirrorless Interchangeable Lens Camera

hello everyone and today I have an unusual piece of kit to test out a very small mirror lens designed for aps-c mirrorless cameras the samyang 300 millimeter F 6.3 IDI UMC CS this will not work on digital SLR cameras at all only mirrorless cameras and it can be bought for about 180 pounds or 250 US dollars even less if you are happy to go on eBay the idea of mover lenses is that they're designed to give you a very long reach in this case 300 millimeter in a small and inexpensive lens and this piece of get is certainly very small you could take it anywhere with you it comes in silver or black and it's manual focus only and has only one aperture available a pretty dark F 6.3 and mirror lenses often have optical issues well we'll see about that later the build quality of this particular lens seems to be quite nice at first there's metal in its construction and the focus ring is very white