Opteka 800mm f/8 Mirror Lens

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Mirror Lenses Can Produce Great Pictures
Under Carefully Chosen Conditions

Opteka 800mm f/8 High Definition Telephoto Mirror LensThe Opteka mirror lens is incredibly compact and lightweight. Using an advanced reflex design.  When combined with the T-mount to fit your camera system, this mirror lens is ideally suited for wildlife and sports photography. It has a fixed aperture of f/8

Opteka mirror lenses incorporates advanced computer designed optics and the latest in multi-coating techniques. The process of multi-coating assures virtually flare free photographs even under adverse lighting conditions resulting in crisp high contrast pictures with full color fidelity.

Their most salient characteristic is the annular shape of defocused areas of the image, giving a doughnut-shaped 'iris blur' or bokeh, caused by the shape of the entrance pupil.

Currently only Sony (formerly Minolta) offers a 500 mm catadioptric lens for their Alpha range of cameras. Samyang offers a variety of uniquely priced optics, delivering a lot of optical capability for very little money. These rebranded catadioptric lenses are available under the names of Bower, Opteka, Phoenix, Rokinon, Sakar,  Vivitar and others.

Mirror lenses can produce pictures and under carefully chosen conditions they may even produce pretty good ones. However, these situations are rare and therefore most will have unsteady background blur. Most mirror lenses suffer from a rather mediocre optical performance. This may all be fine for personal purposes and for documentation but most likely you'll not be able to sell such pictures. Therefore a classic (refractive) lens like a 400/5.6 fix-focal or even a xx-500mm zoom or even a 70-300-f/4-5.6 with a 1.4 or 2x teleconverter is usually a better and more serious approach. Nonetheless mirrors are quite cheap (but you get what you pay for).

(To rephrase the paragraph above: Mirror lenses are Junk!)


Advances in high-index / low-dispersion optical glasses, new barrel materials, and exotic anti-reflection coatings, along with the latest in computer-aided-design / computer-aided-manufacturing, are combined to produce lenses of unprecedented quality. Diamond-cut from crystal-clear, water-white optical glass, Opteka lenses are ground and polished to a precise precision.

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Lens styleMirror
Max Format Size 35mm  
Lens focal length800mm  
Stabilization type No
Camera mount T-mount
Angle of view 2.6 x 1.7 (WxH)
1.7 x 1.1 (WxH) w/ APS-C (15 x 22mm) cameras 
Largest aperture opening Fixed f/8
Smallest aperture opening Fixed f/8  
Includes aperture ring Yes  
Total diaphragm blades  
Total Elements 8  
Number of Groups 8  
Coatings / special elements Multi-coating  
Minimum focus distance 11.5' (3.5 m)  
Autofocus type N/A
Motor No  
Full time manual focus Yes  
Focusing method    
Lens distance scale No  
Depth of field scale No  
Magnification 1:3  
Overall weight0.79 lb (360 g)  
Lens diameter 4.4" (111mm)  
Overall length 5.2" (132mm)  
Construction materials Composite / glass  
class="label">Lens ColorBlack  
Zooming method N/A  
Filter thread size Rear-mounted screw-in 30.5mm / Front 72mm  
Lens hood included No  

Lens Includes
Opteka High Definition 800mm F/8 Mirror Telephoto Lens,

T-Mount Adapter,


Front and Rear Lens Caps.



Opteka 800mm f/8 High Definition Telephoto Mirror Lens

Opteka 800mm f/8 High Definition Telephoto Mirror Lens

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