Pentax M42 lens mount focal reducer speed booster adapter to m4/3 mft AF100 OM-D G-M1 BMPCC GH4

new optics design Focal reducer/Speed booster adapter

for Pentax M42 screw mount lenses to m4/3 (mft) mount cameras

All metal structure, with excellent opticals (4 elements/2 groups)

what it does:

• reduce the focal length (by 0.72x wider)
   

　

• effectively increases the maximum aperture of the lens by 1 stop
   

• (in other words, under the same aperture, you can use faster shutter speed (by 1 stop).

　 what it does not:

there is no electronic integration, no auto fucusing

 

　

　

Links to customer review

 

https://vimeo.com/85549868

http://youtu.be/ry0nuJrXhpg

http://youtu.be/OXp_J4nvFUo

 

 

 

　

　

　

　

　

　

 

　

 

 

 

 

　

　

　

 

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