OM Macro and Extension tube

Discussion in 'Adapted Lenses' started by playak47, Nov 20, 2010.

  1. playak47

    playak47 Mu-43 Veteran

    297
    Nov 4, 2010
    I have OM 50mm f3.5 macro lens with fotodiox OM to :43: adapter. I have not bought the 25mm extension tube yet but I am wondering if the my adapter is working as extension tube. It seems like fotodiox and 25mm extension tube is similar in size. What do you think? Should i still buy extension tube and get even more magnification?


    Here are the two links

    Amazon.com: Fotodiox Lens Mount Adapter, Olympus OM Zuiko Lens to MFT Micro 4/3 (Four Thirds) System Camera Mount Adapter, for Olympus Pen E-PL1, E-P2, Panasonic Lumix DMC-G1, G2, GH2, GF1, GH1 G10,: Camera & Photo

    Amazon.com: Olympus EX-25mm Macro Extension Tube for E1, E300 & E500 Digital SLR Cameras: Electronics
     
  2. Djarum

    Djarum Super Moderator

    Dec 15, 2009
    Huntsville, AL, USA
    Jason
    The thickness of the adapter takes into account the flange difference between OM and mFT so the lens can focus to infinity. The ex-25mm is a 4/3 macro adapter for 4/3 lenses, not OM lenses.
     
  3. Sammyboy

    Sammyboy m43 Pro

    Oct 26, 2010
    Steeler Country
    The correct OM to m43 adapter thickness should be 26mm. The register for the OM is 46mm, m43 register is 20mm.

    The OM had these extension tubes:
    7mm manual
    7mm auto
    14mm manual
    14mm auto
    25mm manual
    25mm auto
    65-116 adjustable auto tube

    If you use any OM auto lens in the reverse position, you should use the manual tubes, this allows the aperture to be set at various stops.

    Some other register:
    Nikon F 46.5mm
    Leica R 47mm
    Leica M 27.95mm
    Olympus Pen F 28.95mm
    Canon R/FL/FD 42mm
     
  4. playak47

    playak47 Mu-43 Veteran

    297
    Nov 4, 2010