The black Samyang Reflex 300mm f/6.3 ED UMC CS Lens is a mirror lens designed specifically for use on Fujifilm X mount cameras. The lens' Cassegrain design enables it to achieve a 450mm 35mm-equivalent focal length perspective within a compact and lightweight lens design that is significantly smaller than a traditional 300mm lens. It features a fixed f/6.3 aperture and manually focuses as closely as 2.95'.

One extra-low dispersion element and the inherent mirror construction of the lens work to eliminate chromatic aberrations while providing notable image sharpness and clarity. Furthermore, the UMC (Ultra Multi Coated) coating has been applied to reduce surface reflections, lens flare and ghosting while also contributing to improved overall contrast.

Fujifilm X Mount/APS-C Format    450mm (35mm Equivalent)    Fixed f/6.3 Aperture    Catadioptric Telephoto Lens    UMC Multi-Layer Anti-Reflective Coating    One Extra-Low Dispersion Glass Element    Manual Focusing as Close as 2.95'

Mirror lens designed specifically for Fujifilm X mount cameras.

Catadioptric system with Cassegrain design helps to reduce the overall size of the lens while still providing a 35mm-equivalent focal length of 450mm.

One extra-low dispersion element and a UMC coating are integrated into the lens construction to improve sharpness and clarity as well as enhance the overall image contrast.

Related Questions and Answers

Q: 1. Can this use with tel converter?

A: Hi, teleconverters work best with lenses with a maximum aperture of f/2.8; this lens has a maximum aperture of f/6.3, so, although you could mount the lens to a teleconverter, there would be no autofocus or auto exposure.

Q: 2. Will this lens work with the Panasonic Lumix DMC-GH4?

A: Yes, this lens great for GH3,4 use M 3/4 lens mount !

Q: 3. Hi is it work with sony full frame like a7 iii ? Or is it need adapter?

A: The Rokinon Reflex 300mm f/6.3 ED UMC CS Lens for Sony E Mount is designed for the Sony E-mount used on the Sony Alpha a7 III Mirrorless Digital Camera. No adapter is designed to connect the lens to the camera. However, do note that the Rokinon Reflex 300mm f/6.3 ED UMC CS Lens for Sony E Mount is designed for the smaller APS-C sensor. As such, you would need to use the APS-C Crop Mode when using this lens on your camera. You can access this setting by going to the MENU on your camera and going to [Camera Settings 1] → [APSC/Super 35mm] → [APS-C S35 Shoot: Manual] and [ON].

Q: 4. Is this lenses all manual (focus and iris)? Can it be used with BlackMagic 2.5k mount MFT?

A: The BlackMagic Cinema MFT mount camera requires use of manual focus and manually adjustable aperture lenses. The black Rokinon Reflex 300mm f/6.3 ED UMC CS Lens will mount on the camera but will not allow you to adjust the aperture of the lens as this lens has a fixed aperture of f6.3. The benefit of the camera using the MFT mount is the availability of adapters which will allow one to mount various manual focus/manual aperture lenses to the camera.

Q: 5. will focus peaking work on the Nikon D850 with this lens?

A: Yes, focus peaking should work with any lens you use on the D850 including this lens.

Q: 6. Is this a good lens to capture my son in marching band on the football field? Night performances under lights. Will this work on my 7d camera?

A: This is a fix focal length and manual focusing lens with a preatty small aperture it will be compatible with your canon 7d , but for a moving object in a low light , I wouldn't recommend it, instead I will use some telephoto zoom with auto focus and a better f stop performance.

Q: 7. Are there front filter threads , and if so so what size are they? Images appear to show threading, but it could be non-standard filter threads.

A: Yes you are correct, those are front filter threads. The front thread diameter is a standard 58mm size, so any lens caps or filters made for 58mm diameters will be compatible.

Q: 8. Is this lens good for a converted IR Camera or does this lens produce what they called a hot spot area?

A: Ive seen some great IR shots taken with this lens and an IR modified DSLR. Though, there are apparently mixed reviews as to the IR performance of the lens. You should be able to avoid hot spots using the lens by not using smaller apertures or simply changing the angle of your camera.

Q: 9. Is this lenses all manual (focus and iris)? Can it be used with BlackMagic 2.5k mount MFT?

A: The BlackMagic Cinema MFT mount camera requires use of manual focus and manually adjustable aperture lenses. The silver Samyang Reflex 300mm f/6.3 ED UMC CS Lens will mount on the camera but will not allow you to adjust the aperture of the lens as this lens has a fixed aperture of f6.3. The benefit of the camera using the MFT mount is the availability of adapters which will allow one to mount various manual focus/manual aperture lenses to the camera.

Q: 10. Is this lenses all manual (focus and iris)? Can it be used with BlackMagic 2.5k mount MFT?

A: The BlackMagic Cinema MFT mount camera requires use of manual focus and manually adjustable aperture lenses. The silver Rokinon Reflex 300mm f/6.3 ED UMC CS Lens will mount on the camera but will not allow you to adjust the aperture of the lens as this lens has a fixed aperture of f6.3. The benefit of the camera using the MFT mount is the availability of adapters which will allow one to mount various manual focus/manual aperture lenses to the camera.