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Metabones Nikon G to Pentax Q Speed Booster Q666 0.50x

Metabones Nikon G to Pentax Q Speed Booster Q666 0.50x


“The Devil’s Speed Booster”, exclusively for Pentax Q series cameras.  With its 0.5x magnification and world-record f/0.666 maximum speed it is crazy wicked fast.  So make a deal with the devil today and turn your Pentax Q with its back-illuminated sensor into a monster low-light machine unlike anything ever seen in photography.  Attach an f/1.2 lens and stop down a little to see how Stanley Kubrick made do with f/0.7 for filming those famous candle-lit scenes in “Barry Lyndon”.  Or open up all the way to f/0.666 and probe the darkness in a way that no photographer has ever been able to do until now.

With an advanced 6-element optical design, the Q666 packs lots of optical horsepower in a small package.  Sharpness is excellent even at f/0.666, and is downright superb if you stop down to f/1.0.  Distortion is very low, with a maximum value of, naturally, 0.666%.  And thanks to the back-illuminated sensor used in Pentax Q cameras, the full f/0.666 maximum aperture can be utilized with minimal pixel vignetting effects commonly seen in other cameras used with high-speed lenses.


Color:  Black Satin exterior; Black Matte interior
Magnification:  0.50x
Crop Factor for Pentax Q, Q10:  2.8x
Crop Factor for Pentax Q7, Q-S1:  2.3x
Maximum Output Aperture:  f/0.666 (with f/1.2 lens attached)
Rectilinear Distortion:  < 0.666%
Lens Elements/Groups:  6/4
Length Reduction:  10.1 mm
Supported Cameras:  Pentax Q, Q10, Q7, Q-S1
Camera Mount:  Pentax Q-mount
Image Format:  7.44 mm x 5.58 mm (1/1.7”)
Lens Mounts:  Nikon F/G (include non-AI & AI lens mounts) 
Lens Compatibility:  Any full-frame (36 mm x 24 mm format) or DX format (APS-C) lens with the appropriate mount can be used.
Special Features:  Long-throw clickless aperture ring on Nikon F/G version. Industry's best aperture ring covers a 8-stop range markings, clearly indicating actual number of f-stops. No more guesswork! (Patent pending).
The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo Clam ball heads.

List of incompatible lenses

Nikkor 2.1cm f4
20/2.8 AI-S

Before mounting your lens to the adaptor, please make sure that the f-stop of aperture ring on the adaptor is turned to "7" (i.e. mounting your lens to the adaptor while only the aperture ring in the adaptor is full closed.).

This mount is manual aperture control. It does NOT support electronic aperture control

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