Minolta 50/1.4 MC Mount adapted to RF Coupled M-Mount

Discussion in 'Adapted Lenses' started by Brian, Apr 5, 2013.

  1. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    This lens was made for the Minolta SRT-101. In the 1976 Pop Photo tests of 32 lenses, it had the best center-sharp performance of SLR lenses. This one has perfect glass, was $40 at a Photorama camera show. Adapted to M-Mount using a Foto-Diox adapter ($35), the leg from a tripod, and a retaining ring from an old lens.

    Wide-Open, F1.4 on the M8.

    [​IMG]

    [​IMG]

    This lens is known for being center-sharp. A great match for the M8.
     
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  2. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    Wide-Open, RF coupling holds to 0.65m

    [​IMG]

    [​IMG]
     
  3. defektive

    defektive Leica Place Regular

    57
    Mar 30, 2013
    Please explain? :confused:
     
  4. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    [​IMG]

    I use a pipe-cutter on the tubular leg of an old tripod leg and a retaining ring from a Russian lens to make the RF Cam. It must be polished down to the correct length. The retaining ring went into the inside of this one t build of the thickness for the cam follower of the lens.
     
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  5. ajramirez

    ajramirez Leica Place Veteran

    267
    Mar 30, 2013
    Caguas, Puerto Rico
    Antonio
    To me, it is absolutely amazing that you can do these things. Thanks for sharing, Brian.

    Cheers,

    Antonio
     
  6. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    Somebody has to adapt lenses to Leica just because Amin created this forum!
     
    • Like Like x 1
  7. Amin

    Amin Administrator

    399
    Mar 28, 2013
    It is amazing that you can do these things, Brian, and I love the character of that Minolta. The leaf photo and the f/4 shot two down from it are both great!
     
  8. Vidar

    Vidar Leica Place Regular

    84
    Mar 30, 2013
    Bergen, Norway
    Vidar
    Impressive work! Well done.
     
  9. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    I would like to try out this lens one day, Brian.
     
  10. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    I will pack it for our Summer trip to Navarre, we just signed off on the Beach House.
     
  11. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    I am looking forward to seeing you again.
     
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  12. Jacm

    Jacm New to Leica Place

    2
    Feb 5, 2014
    Paris - FRANCE
    Very impressive, Brian. Maybe you could show what it looks like ?
     
  13. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    Here is a shot of the lens on the camera, and of the Cam.

    I will replace pictures taken with the lens on the first page.
     

    Attached Files:

  14. barnacksdog

    barnacksdog New to Leica Place

    2
    Dec 16, 2013
    Hi Brian!

    I'm new to this site and haven't really had the chance to browse in depth.
    As mentioned above, it'a amazing that you can do these things. Do you also modify other lenses for rf coupling?

    Hector
     
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  15. barnacksdog

    barnacksdog New to Leica Place

    2
    Dec 16, 2013
    (Oooops! Just started browsing and indeed you do other lenses. My bad.)
     
  16. asiafish

    asiafish Leica Place All-Pro

    Aug 9, 2013
    Bakersfield, CA
    Andrew
    That does not look like an easy job, but many Minolta Rokkor lenses are worth the effort. Before I got into Leica I used Minolta film cameras and adapter Rokkor lenses to the Sony NEX 7.

    Your lens' predecessor, the MC Rokkor 58mm f/1.4 was outstanding, while the MC Rokkor 135mm f/2.8 (the older version, PF I think) had the most delicious bokeh of any 135mm lens I've ever used, better even than the Leica 135mm f/2.8 Elmarit-R. The MC Rokkor 24mm f/2.8 was in fact the very same lens Leitz licensed to make the 24mm f/2.8 Elmarit-R, and I believe a few of the R series zooms were badge-engineered Minoltas as well.
     
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  17. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    This lens has become a favorite on the M8, I prefer it over the Pentax 50/1.4 and Canon FL mount 50/1.4- also converted to M-Mount. All are excellent lenses, and "must-haves" for anyone with a mirrorless camera, including the M240. The Minolta is center-sharp, which matches the M8 crop factor quite well.

    Wide-Open, fall colors in the neighborhood.

    15759548061_65b82f62ba_o. Fall Colors

    This lens maintains RF coupling to 0.65m.

    15576253327_fef04d0444_o. Fall Colors

    15576003638_94b160568f_o. Fall Colors
     
    • Like Like x 1
  18. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    The 50/1.4 is one of the most versatile lenses, and having it in ltm or M mount would be very good, Brian. I have the Takumar 50/1.4 in M mount. The Minolta seems to be a great choice too.
     
    • Like Like x 1
  19. asiafish

    asiafish Leica Place All-Pro

    Aug 9, 2013
    Bakersfield, CA
    Andrew
    Brian,

    Let me know if you ever decide to sell it. I love Minoltas, but don't see myself owning any cameras normally capable of using them for a while.
     
  20. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    I will most likely keep this lens with the M8- this lens is center-sharp, and matches the crop factor well. I need to come up with a repeatable way of making these cams. It would not be hard for a machine shop to do a replacement cowling for the rear element, and have some sort of an adjustment for calibrating the cam to a camera- like a ring screwed into the extension, with a set screw.

    15590636189_84dba17f07_o. Fall Colors

    Total cost of this lens with the adapter was under $75. I picked up an MD 50/1.4 for $15, had some fungus that cleaned out. Winter is coming, cold/wet weekends are good for lens hacking.