Olympus 250mm f2.0 46mm drop in filters

Discussion in 'Olympus' started by terry_h, Jul 26, 2006.

  1. I just got one of these lenses used and it has a drop in holder for 46mm
    filters. Has anyone come across a source for these 46mm rear filters? What
    filters were made for this lens? I am interested in ND4X, RED and ORANGE if
    possible. Any help would be greatly appreciated.
  2. Regular 46mm screw-in filters don't fit? On eBay there's a member with the name Olympususa. I saw this seller selling new OM equipment inclusive original OM filters. I have just checked but there is curently nothing fo sale. But I would ask the seller about the filters anyway.
  3. It wouldn't surprise me at all if these are the same as filters used for pro film/video cameras.
    Maybe search for those? Also: call Olympus support to ask their advice!
  4. http://www.mir.com.my/rb/photography/hardwares/classics/olympusom1n2/shared/zuiko/htmls/250mm.htm?bcsi_scan_EC706EF5A8F021EE=0&bcsi_scan_filename=250mm.htm

    - scroll down to the bottom- The filters are described as slip in type, which I am not familiar with - does not sound like 46mm standard screw in type - so may be from the cinema/film industry?
  5. It will proable be like the Nikon 300 F2.8 that uses the same system. The link shown to the photo in malayia site shows a filter holder that you screw 46mm fiters onto then you 'drop' the whole thing in a secure it with the screw type contraption at the top of it.

    If I remember rightly early video cameras took 46mm filters so you should be able to find coloured ones around.


  6. The 250/2, 350/2.8, and 180/2 all use standard threaded filters in the drop-in holder. Unscrew the holder and the filters screw into the holder's threaded ring.

    B&H Photo has MC B+W filters in 46mm, which is the only brand that I'd buy. Their MC filters are very nice, IME.

  7. Thanks for your responses. I really appreciate it. I have one more question. This Olympus 250mm f2.0 lens I have came with a Canon FL mount on it and I hear that other mounts were available for this lens, including a mount for Canon EOS. I currently use this lens on a Canon T90 body with a doubler (2xB) to make a 500/f4 birding lens. Has anyone heard of these interchangeable Olympus auto-t mounts for non-Olympus cameras? Thanks again for any help you may have.
  8. No Olympus lenses were never made in any normal SLR mounts except for OM-Series cameras. Any that you find today were modified to fit another camera outside the factory and are un-authorized mods. Personally, I've heard of the following lenses being modified either for Canon, Nikon, or Leica.

    24/3.5 shift
    8/2.8 fisheye

    (The 35-80/2.8 was made OEM for Sinar for it's digital studio camera line.)

  9. Dear Sir!
    It's possible to buy this special drop in/slide in filter by a highly recommended OM dialer in Germany, dialing original OM-Parts.
    The price is listed with 50 Euro.
    The 2,0/250mm and 2,8/350mm are optical calculated for use of the original 46mm rear filter, which is an essential part of the optical construction.
    Also are this objectives (and the 2,0/180mm) useable only with the original OM converter 1,4 x A.
    Hope to help You, sincerly,
  10. Sorry to revive a zombie thread, but I am in the process of making some of these filter holders. Please PM me if you'd like one or more.

    To dispel some of the misinformation here:
    • standard 46mm filters will not work! The olympus filter that comes in the holder is slightly smaller, and has a different thread pitch, and is also way thinner than any filter available on the market.
    • the holder is very different from the Nikon 300/2.8 holder. I bought one in the hope that it would work, but it is much thicker and has a different latch.
    • as @skip_williams mentions, none of these lenses were ever produced in anything but the Olympus OM mount, although they work brilliantly with modern mirrorless cameras and an adapter.
    The holders I am making will have a standard 46mm x 0.75 thread, but because of the narrow slot, it will still not take the standard filters, none of which are 2.5mm thick or less. Rather, you will be able to disassemble your favourite 46mm filter, pop the glass element out, put it in my filter holder, then screw in the retaining ring.

    I am also working on a design for a rotating element filter holder that will at least work with a circular polarizer, graduated filter, or any other rotating filter that does not depend on two elements that rotate independently.

    Here's a shot from the 350/2.8 with the OM 1.4X-A teleconverter, for an effective 500/4, on the Olympus OM-D E-M1 Mark II. This lens also works wonderfully with the Metabones Speedbooster Ultra, yielding an effective 250/2.
    Heron 3.jpg
  11. Hi bytesmiths and all.

    Very interesting thread.

    Touching base regarding your filters for the OLY 250mm f2.

    Did you end up making them and if so are they available for purchase?


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