Nikon "Lens Coupler" - have you heard of it????

Discussion in 'Nikon' started by Father Kodak, Oct 27, 2005.

  1. Father Kodak

    Father Kodak Guest

    Has anyone ever heard or used a Nikon "lens coupler," which consists
    of two rear lens caps, attached to each other. Someone has been
    selling this item on ebay, claiming that is it very rare.

    Father Kodak
    Father Kodak, Oct 27, 2005
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  2. Father Kodak

    Charles Guest

    I couldn't find it with that description. Maybe it should be rare if
    it's useless.
    Charles, Oct 27, 2005
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  3. Father Kodak

    Sharp Guest

    I've never heard of anybody selling them -- I've made a few by using
    superglue to stick two rear lens caps together back-to-back. It's
    pretty handy for letting you stick two lenses into one section of a
    gadget bag while keeping them from banging into each other.
    Sharp, Oct 27, 2005
  4. Father Kodak

    DoN. Nichols Guest

    I've received one such on a Nikon lens purchased at a hamfest
    (180mm f2.8, if anyone cares -- it has since been "chipped" to allow
    metering on the D70.)

    I liked the idea, and made two more, to make things better
    organized in my camera bag.

    Note that the knurling on the outside of the current caps
    extends a little beyond the end, and will interlock with another.

    I hold them in loose contact and run a thin bead of MEK (Methyl
    Ethyl Ketone) around the joining point, making sure that they separate
    enough so it flows between them. I then clamp them together (not much
    force needed, just enough to hold them in contact) for about fifteen

    I then set them aside for a couple of more hours so the last of
    the MEK will evaporate. (It partially dissolves the plastic, and lets
    it weld together.)

    It is best if you do this outdoors, or in a part of the house
    not used for much living in, such as the garage, to let the MEK fumes
    dissipate. My garage is my machine shop, FWIW.

    I have used them to keep pairs of shorter lenses together as a
    vertical stack in a single pocket in the camera bag. It cuts in half
    the number of pockets used, and makes the lens easier to grasp to
    extract, compared to a short lens at the bottom.

    FWIW, I made the first one with two new back caps purchased at
    the local camera store. This (when put to service) freed up two more to
    be similarly treated.

    As you can tell from the above, *I* find them useful enough to
    make them -- but certainly not enough to spend more than the price of
    two standard back caps. :)

    How much is the fellow on eBay asking as a starting price? Two
    standard back caps and a can of MEK (at the local Home Depot) will do
    the job nicely if you want them, and I'll bet that this is what the eBay
    seller has been doing.

    DoN. Nichols, Oct 27, 2005
  5. Father Kodak

    Father Kodak Guest

    Well, I emailed him and he * claims * that this is an official Nikon
    part. I'm a bit sceptical, actually.

    Father Kodak, Oct 27, 2005
  6. Father Kodak

    Father Kodak Guest

    Yeah. Right now, I stack two short lenses in one pocket of my camera
    bag. Yes, they bang against each other, and the idea of this two-sided
    rear lens cap sounds good. Another person gave detailed instructions
    for making them. I think i'll try that myself.

    Father Kodak, Oct 27, 2005
  7. Father Kodak

    Doug Robbins Guest

    This is simply two rear caps glued back to back. Its an old phototog's trick
    for storing two short lenses in minimum space. The ebay seller is an idiot.

    Doug Robbins, Oct 27, 2005
  8. Father Kodak

    Tony Polson Guest

    The ebay seller is just an opportunist. The idiot would be the buyer.
    Tony Polson, Oct 27, 2005
  9. Father Kodak

    Doug Payne Guest

    I've got a couple in my bag - a few pennies worth of crazy glue and a
    few minutes of my time. They make it easier to stack (physically)
    shorter pairs of lenses in a bag. But hey, if you think they're rare,
    I'd be happy to sell you a set for, let's say, $2,500. Hell, I've got
    another rare item that lets me couple two lenses front-to-front. I'll
    throw in one of those for another $2,500.
    Doug Payne, Oct 27, 2005
  10. Father Kodak

    Hunt Guest

    If I understand what you are describing, the idea of joining two rear lens
    caps to allow stacking of shorter lenses in one's bag was introduced to me in
    the Nikon School back in about '76 (1976). I used a few of these for 20 & 24
    mm, 28 & 35mm mm, 2 50's. They work well, with one caveat. The lenses can
    loosen when the bag is in rough use, and extracting the two lenses can result
    in one, or both, being attached rather loosely. Care should always be taken,
    least you end up juggling 2 lenses, and the glued-together coupler! If they
    were mfgr'ed that way, they may be rare, but if they were just glued, then not
    so rare.

    Hunt, Oct 27, 2005
  11. Father Kodak

    wilt Guest

    I don't understand why anyone needs to connect two lenses to use a
    single compartment in the bag...I simply use sections of closed cell
    foam cut to fit, which are pieces cut out from the inexpensive ground
    pad that you can find in Kmart of outdoor goods. No worry about lenses
    loosening from the cap since you are always grasping one lens at a
    time, separated by these closed cell dividers.
    wilt, Oct 27, 2005
  12. Father Kodak

    G.T. Guest

    That's what I do, too. But I can understand the appeal of the coupler. The
    lens cap is basically never loose because it stays connected to the other
    lens. And it makes it easier to get the lens that is at the bottom of the

    G.T., Oct 27, 2005
  13. Father Kodak

    wilt Guest

    The lens cap is basically never loose because it stays connected to the other
    lens. And it makes it easier to get the lens that is at the bottom of
    stack. <<

    The cover that clips into the filter threads I can understand not
    loosening. But every cap on the BODY side of the lens seems to never
    stay firmly in place, and I have several brands of cameras to conclude
    that generality!
    wilt, Oct 28, 2005
  14. Father Kodak

    G.T. Guest

    Haven't had that trouble with my Canon lenses and one Tamron.

    G.T., Oct 28, 2005
  15. Father Kodak

    DoN. Nichols Guest

    [ ... ]
    So am I.

    But it would be easy enough for Nikon to make them the same way
    that I did if they wanted to.

    Does the eBay photo happen to be good enough (and at a
    reasonable enough angle) to see whether it has a shape in the middle
    matching that of the two truncated cones joined at the "small" end which
    result from a joining such as mine.

    I would put up a web image of one of them to allow you to
    compare, except that right now I'm in the middle of a change of of ISPs,
    and a lot does not work yet -- including access to my web pages.

    DoN. Nichols, Oct 29, 2005
  16. Father Kodak

    DoN. Nichols Guest

    Not a problem for me with the Nikon design of bayonet lens
    coupling at least.

    And the lens caps with the spring loaded threads often does not
    get a firm enough grip on some lenses to reliably handle the weight of
    the lens, or a second lens. Lens caps are quite light, so there is no
    real reason for them to maintain a death grip.

    DoN. Nichols, Oct 29, 2005
  17. If you had a bunch of these, plus several reversing rings, you could attach
    several lenses together, front to front, and back to back.....You might get
    several feet of lenses.....You could carry them in a tripod bag.....:^)
    William Graham, Oct 29, 2005
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