Mitakon speedbooster anyone ?

Discussion in 'Accessories' started by izTheViz, Jan 6, 2014.

  1. izTheViz

    izTheViz TalkEmount Top Veteran

    May 10, 2013
    Yannis Marigo
    Did anyone already tried out a
    Mitakon speedbooster ? I know I can't expect the Metabones quality but I wonder if they are still worth.
  2. davect01

    davect01 Super Moderator Subscribing Member

    Aug 20, 2011
    Fountain Hills, AZ
    Not me
  3. quezra

    quezra TalkEmount Top Veteran

    Aug 22, 2012
    Mitakon lens turbo is the same as the Zhongyi one. Personally I found the FD-NEX booster adequate for IQ, but I was annoyed that I couldn't stop down my lenses with it, and so very hard to use with superfast glass (I want the full frame circle, I don't care for extreme aperture speed/DoF). Then there was a problem with accepting my FL lenses, and so it went into cold storage. Next thing I knew I had a full frame camera in my hands :p
  4. michelb

    michelb TalkEmount Veteran

    Oct 27, 2013
    Greater Montreal area in Quebec, Canada
    Michel Brien
    I have had the Zhongyi for SR/MC/MD lenses for a couple of months now and i am surprised at the results i get

    I did a comparison on Dyxum of Zeiss 24mm f1,8 SEL and Sony SEL 35 F1,8 versus the 1st Minolta MC Rokkor 35mm F1,8 (circa 1966) with the Zhongyi and with just a plain adapter
    If you click on the pictures, i added some infoon each picture showing set-up/speed/ aperture used
    My only mistake on this test is that i should have dialed in Daylight White balance cause wit the Lens Turbo, it seems the camera is seeing a different color temperature and pics with it are always 700-800 degrees Kelvin over corrected (more yellowish than they actually are)

    You can see some result Here:[email protected]/sets/72157636370027475/

    I have been using it on occasion with others Minolta lenses and except for some purple circle in the middle of the frame at apertures of F11 to F22 under certain lighting conditions ( Internal reflection from sensor on rear element of adapter coupled with back reflection of aperture blades i guess), i am pretty happy that it doubles the usefulness of these old friends
    Here is an example at small apeture with Minolta Bellows Rokkor TC 135mm F 4 ( circa 1959) mounted on Minolta Bellows from the same era at F16

    1st camera set-up: NEX-7 /Lens Turbo/ Minolta Bellows Rokkor TC 135mm F4 ( this is a bellows lens so it does not have a focusing ring)

    And the result with the purple circle in the middle of the frame ( Note that this happens mostly when very high contrast situations with sun almost in the frame or with very high reflective background like a white wall surroundig a darker subject and this only at F11 and smaller apertures)


    To see more images with same set-up
    Here:[email protected]/sets/72157636191007204/
    • Like Like x 3
  5. izTheViz

    izTheViz TalkEmount Top Veteran

    May 10, 2013
    Yannis Marigo
    Thanks. Very informative.
  6. Synomis192

    Synomis192 TalkEmount Regular

    May 26, 2013
    I actually bought a non-branded lens turbo adapter for my MD lenses for $99usd on eBay. I thought it would've been a bust, but its been performing great on my camera. The blue dot doesn't occur for me as much as people say, even shooting at f/8-16.

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