Discussion in '35mm Cameras' started by Annika1980, May 17, 2004.

  1. Annika1980

    Annika1980 Guest

    Annika1980, May 17, 2004
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  2. Annika1980

    Lionel Guest

    Kibo informs me that (Annika1980) stated that:
    You should try it again with a prime lens instead of a zoom. ;)
    Lionel, May 17, 2004
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  3. Annika1980

    Nick J Guest

    I'll offer a lend of the feckin fantastic 135 f/2.0 L ;)
    Nick J, May 17, 2004
  4. Annika1980

    Alan Browne Guest

    Crappy actually.

    That lens seems very specialized and might end up on the shelf unless
    you do a lot of very close up magnified macro work. You would likely do
    better with an ordinary 1:1 macro like the Cannon 100 f/2.8 macro or
    Tamron 90 f/2.5 macro.


    Alan Browne, May 17, 2004
  5. Annika1980

    Guest Guest

    Guest, May 17, 2004
  6. The Canon 100 f/2.8 is a very fine lens, an I suspect it would indeed do
    much better than the zoom with stacked extenders (which basically enlarge
    the center lens aberrations as well).

    Alternatively, Annika could try and use a standard lens in reverse, held in
    front of another (moderate tele)lens. If it works and the reversed lens has
    a large enough aperture (to avoid vignetting), one could try and find an
    adapter ring that fits the filter threads of both lenses.

    To illustrate, I just handheld an old FD 50mm f/1.4 in front of my G3 point
    and shoot, and got this:
    (cropped some vignetting and downsized to full screen). The heart of the
    strawberry-to-be is approx. 3mm. A much larger sensor should be able to
    improve on that. Using a tripod and smaller aperture could have improved the
    result, but as an illustration it should be adequate.

    Bart van der Wolf, May 17, 2004

  7. Have you seen Franks site? ... ... Most taken
    with the MP-E, a MT-24EX and a D60 I believe
    Simon Stanmore, May 17, 2004
  8. Annika1980

    Annika1980 Guest

    From: Nick J
    Using extension tubes, you won't get the magnification with a long lens that
    you will with a shorter FL lens.
    I forget the formula for determining macro size with extension tubes. Maybe
    someone else knows it?
    Annika1980, May 18, 2004
  9. Annika1980

    Annika1980 Guest

    From: "Simon Stanmore"
    Thanks for the link. You just cost me a grand.
    Annika1980, May 18, 2004
  10. SNIP
    Depends on the parameters available, but Extension = f*M , where f=focal
    length and M=magnification on sensor.
    Part of the extension may be achieved by 'focusing closer than infinity', so
    the tube length may be shortened by that distance.

    For Macro photography, total depth of field = 2*c*I*(M+1) / M^2, where
    c=circle of confusion, I=aperture and M=magnification on sensor.
    Circle of confusion depends on a number of criteria (wavelength, sensor
    size, output size, viewing distance) but, for the D60/10D sensor, 0.016 to
    0.019 are acceptable numbers.

    Bart van der Wolf, May 18, 2004
  11. SNIP
    Or for a more expensive solution for EOS camera mount systems,

    There may be others offering such a solution.

    Bart van der Wolf, May 18, 2004
  12. Annika1980

    Annika1980 Guest

    From: "Bart van der Wolf"
    I think my circle of confusion just got bigger.
    Annika1980, May 19, 2004
  13. Annika1980

    hamish11 Guest


    Just curious. How were you able to get the 1.4 open all the way. I
    thought that the FD series would not open full unless it was on
    cameral or was reversed using the MA-55 adapter. I have been wanting
    to reverse my 1.4 but can't find the adapter anywhere. Any alternative
    solutions would be appreciated.
    hamish11, May 19, 2004
  14. It (mine at least) is full open when off camera. Should you want to close
    aperture, you'll need to push the small (2/3rd hidden) spring in the barrel
    that locks the fastening ring in place (small screw driver or paperclip).

    For the method I described (in front of other optics, as a diopter lens),
    you don't want to close the aperture, as it reduces field of view by
    vignetting. However, just using it in reverse by itself does require an
    adapter if I correctly (and vaguely) recall.
    I sold my FD 50mm macro lens, and have since acquired the EF 100mm f/2.8 II
    lens, so I've not felt the need to look too hard for a reversal ring.
    However, it does work fine on my P/S G3 (even hand held), so I might look
    for, or have one custom made, to bridge the 55-58 male-male filter threads.

    Bart van der Wolf, May 19, 2004
  15. Annika1980

    Mike Engles Guest


    It is worth buying a Canon just for the lens.
    It looks like a terrific lens. Really only usable at life size as it
    would be difficult to get close to some subjects for larger

    Mike Engles
    Mike Engles, May 22, 2004
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