Experiment that worked: Takumar 24mm f/3.5 on a Leica M2

Discussion in 'Rangefinder Forum' started by Kodachromeguy, Nov 9, 2018 at 12:02 AM.

  1. Kodachromeguy

    Kodachromeguy Subscriber

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    Hi Everyone,
    When I travel overseas and need to pack light, I usually take my Leica M2 with 35mm and 50mm Summicron lenses (and light meter, filters, and hoods). But recently I have been thinking wide, which must go along with my increasing girth. I would like the genuine 24mm M lens or the 25mm Zeiss, but realistically would not use them all that often. But I have a clean Super-Multi-Coated Takumar 24/3.5 lens for the Spotmatic. So I bought a $20 Fotodiox M42-Leica M adapter and did a test run.

    The good: the optical results were better than I expected. I do not have a genuine Leica 24, so I have no basis for comparison. Sure, it is not as "sharp" as the 35 Summicron, but so what? For $20, I am pleased.
    The clumsy: Framing is a problem, but when I move my eye left and right and up and down the maximum extent across the M2's eyepiece, I think I am seeing most of the 24mm coverage. The lens blocks part of the view, and using the genuine Takumar hood is hopeless. To do: buy a 24mm finder. Focus is totally manual.
    The heavy: The Takumar with its Fotodiox adapter is a big and rather heavy cylinder.

    Here are some examples from Romania and from Greece. The view of a church is in Sibiu, Romania, with a yellow filter to darken the sky. The abandoned hotel is in Nerantza, Greece. The film was Fujifilm Acros, exposed at EI=80. Praus Productions in Rochester, NY, developed the film in Xtol. I scanned the film with a Plustek scanner using the Tri-X 400 profile (the SilverFast software does not have an Acros profile).

    20181009l_Kronhaus-Brașov_cleaned_resize.JPG 20181009m_Kronhaus-Brașov_cleaned_resize.JPG 20181013a_UpperTown-Sibiu_cleaned_resize.JPG 20181019f_Hotel-Nerantza-bw_resize.JPG 20181019g_OldWall-Nerantza-bw_cleaned_resize.JPG
     
    Last edited: Nov 9, 2018 at 11:32 AM
  2. awty

    awty Subscriber

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    Sweet! for 20 bucks who's going to complain about a little bit of distortion and a few soft corners. Just stop down an she'll be alright.
     
  3. ic-racer

    ic-racer Member

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    I'm looking at a Fotodiox adapter for my equipment. The one I need has a lens in it and is for SLR so focus is no issue. What about yours? Is there a lens in it? How do you set exposure? Is there something that keeps the lens stopped down? How about focus?
     
  4. OP
    OP
    Kodachromeguy

    Kodachromeguy Subscriber

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    Hi, good questions.
    1. The adapter I used was for a SLR camera lens (thread-mount M42) to be mounted on a Leica rangefinder body. So my mount is just a tube with the correct fittings on each end. There is no glass in it.
    2. Exposure: I use a handheld Gossen Luna Pro digital light meter. I read the exposure from the meter and transfer shutter speed to the camera and f-stop to the lens manually.
    3. The adapter pushes the little pin on the back of the Takumar lens, so as I turn the aperture ring, the lens opens or closes.
    4. Focus: manual with no rangefinder linkage at all. I edited my original post to state this.
     
  5. Eric Rose

    Eric Rose Subscriber
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    Great images! I am sure you wouldn't be able to tell the difference between a Leitz 35mm and yours when 8x10's are printed.
     
  6. ic-racer

    ic-racer Member

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    Thanks for your reply. I was curious that M42 could mount to Leica M and still focus at infinity, so I looked up the site. I could still not find your adapter on the site, but I found the Rollei SL to Nikon adapter I had always been looking for. In that case the only way to have infinity focus is with an extra optic element. It is less then $40, so not much risk in trying it. I'd like to try my Zeiss 35mm 1.4 on my Nikon F100. I also see they have reasonably priced replacement alligator-connector Rolleiflex TLR camera straps. I found a New one about 15 years ago for about $150.
     
  7. blockend

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    Good results. Glad it worked out.
     
  8. BradS

    BradS Subscriber
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    Nice work. Thank you for sharing your experience and photos.
     
  9. ciniframe

    ciniframe Member
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    If there is an lens in the adapter it will be a weak single negative element, or perhaps a cemented achromat (not likely). This will increase the focal length of the Rollei mount lens a small factor, perhaps 1.2X, which would give a final focal length of 42mm for the lens/adapter combo.
     
  10. ic-racer

    ic-racer Member

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    Fotodiox website shows this image for another adapter, maybe the Rollei to Nikon adapter is similar. The FAQ also indicates the factor is 1.4x for the flange focal length but it does not mention field of view or effective aperture changing though Fotodiox responded to a question here indicating a reduction if field of view with the adapter:

    Screen Shot 2018-11-10 at 2.27.32 PM.png


    A plus is that is seems to be three glass elements that can come out, making the adapter an extension tube for close up photography.



    I may get the adapter and report back.

    Screen Shot 2018-11-10 at 2.05.39 PM.png
     
    Last edited: Nov 10, 2018 at 2:29 PM
  11. ciniframe

    ciniframe Member
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    If the Rollei to Nikon adapter has a 1.4X factor then your 35mm f1.4 will become a 49mm f2 lens, probably with really bad edges and corners until you stop down to f8 or even f11.
     
  12. AgX

    AgX Member

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    A SLR lens on a plain finder camera does not need an optic, just an adapting tube.
    Making the rangefinder working would need a custom solution per lens.
     
  13. julio1fer

    julio1fer Member
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    I found the same solution for low-cost wide, in my case with M39 RF bodies, some years ago.

    You have to guess focus, of course, but focal distances below 28mm have large DOF and are very forgiving of focusing errors, within reason.

    I have a Takumar 24/3.5 that it is not too stellar. On the other hand, my 28mm Takumar is very, very good.
     
  14. ic-racer

    ic-racer Member

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    Since it is so inexpensive I may get it just to see what it does. I do still have six working Rollei bodies for my Rollei QBM lenses.
     
  15. Carter john

    Carter john Member
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    I did a IIIf conversion 40 years ago with a Leica LTM to Pentax converter made by Pentax and then a #1 Pentax extender. I mounted a 28 mm Super-Takumar and had the same problem you did: no finder. Anyway it worked by I never used it much.
     
  16. OP
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    Kodachromeguy

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    This is the one via Amazon (in USA):

    https://www.amazon.com/Fotodiox-Ada...1+Thread+Screw)+Lens+to+Leica+M-Series+Camera
     
  17. ic-racer

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