Considering a Nikon lense

Discussion in 'Nikon' started by Fine Art Photographer, Sep 16, 2003.

  1. Fine Art Photographer

    John Miller Guest

    At least over here we don't have folks putting heavy lens hoods on their
    cameras to improve color rendition. The $1,000 power cords in the high-end
    audio groups are an almost-but-not-quite-entirely unrelated matter.

    --
    John Miller, ducking but not running

    The Lord prefers common-looking people. That is the reason that He makes
    so many of them.
    -Abraham Lincoln
     
    John Miller, Sep 19, 2003
    #21
    1. Advertisements

  2. Fine Art Photographer

    Leicaddict Guest

    --
    Leicaddict
     
    Leicaddict, Sep 20, 2003
    #22
    1. Advertisements

  3. Oh come on. I just shot a roll of TRI-X half with no lens hood and the other
    half with my super deluxe, high end, gold plated contact, oxygen free, lens
    hood and the color rendition was much better with the half with the lens hood.

    Geoff.

    If you did not get it, TRI-X is a monochome film. All colors are rendered
    as black, white or shades of gray. :)
     
    Geoffrey S. Mendelson, Sep 20, 2003
    #23
  4. Fine Art Photographer

    John Miller Guest

    For that matter, I suppose I should have mentioned the trumpet connection
    with heavy lens hoods, but that would have taken some of the mystique out
    of it...
    --
    John Miller

    I consider the day misspent that I am not either charged with a crime,
    or arrested for one.
    -"Ratsy" Tourbillon
     
    John Miller, Sep 20, 2003
    #24
  5. You should be able to see the differences (because differences do
    indeed exist), but a lot depends on your application and style.
     
    Michael Scarpitti, Sep 20, 2003
    #25
  6. Fine Art Photographer

    brian Guest

    The best versions of the 50/1.8 Nikkor were the AI and early AIS. The
    later AIS which comes in a compact mount and only focusses to 0.6m
    suffers from a central ghost image of the aperture stop which can ruin
    infrared and certain ordinary photographs. My late version 50/1.8 AIS
    is now relegated to macro duty in reversed mode, while I use an older
    version 50/1.8 AIS (which focusses to 0.45m) much more often.

    Brian
    www.caldwellphotographic.com
     
    brian, Sep 21, 2003
    #26
  7. Fine Art Photographer

    Gordon Moat Guest

    brian wrote:.
    Brian, since you are up on the lens designs a bit, I wonder if you know how close the old f1.8 design was to the short run of
    the 50 mm f2.0 AI version? Also, the f2.0 has a focus throw of nearly 270 degrees, compared to the nearly 90 degrees of my 50
    mm f1.4 AIS. I wonder if there really is any optical advantage to such a long throw . . . any comments. Thanks.

    Ciao!

    Gordon Moat
    Alliance Graphique Studio
    <http://www.allgstudio.com>
     
    Gordon Moat, Sep 21, 2003
    #27
  8. Fine Art Photographer

    brian Guest

    Gordon:
    The 50/2.0 AI appears to be optically identical to the older H-C
    version: the coatings are the same color, reflected highlights appear
    in the same position and are the same size, and so on. Both versions
    are the most basic 6-element double Gauss consisting of two meniscus
    cemented doublets surrounded by two positive singlets. I only have
    AIS versions of the 50/1.8, and these are clearly different from the
    50/2.0 in that the front doublet is air-spaced. I suspect that the
    50/1.8 AI is optically identical to the early version of the 50/1.8
    AIS, but I don't know for sure.

    The mechanical design of the helicoid would have no impact on the
    optics, since none of the 50mm lenses has CRC. As far as I'm
    concerned, the only advantage of the older long-throw designs is that
    the hyperfocal scale is easier to use.

    Brian
    www.caldwellphotographic.com
     
    brian, Sep 22, 2003
    #28
  9. The design of the 2/50 did not change from the Nikkor-H version.
    It's 6 elements in 4 groups.
    The old 1.8/50 has 6 elements in 5 groups, and clearly different
    optical characteristics.

    This is well described in
    http://www.nikon.co.jp/main/eng/society/nikkor/n02_e.htm

    Regards,
    Chris
     
    Christoph Breitkopf, Sep 22, 2003
    #29
  10. Fine Art Photographer

    Gordon Moat Guest

    I noticed that most of the AI lenses I have show a green or blue reflection at the front. There may be something different about
    the coating. On most of the AIS lenses I have, they look to be more magenta, violet, or even reddish orange when viewed at the
    same angle.

    Would a secondary colour on one of the internal reflected glass elements indicate that an internal element also has a coating, or
    just some optical effect I am observing? It makes me wonder why the coating colours changed so much from AI to AIS lenses.
    I got the 50 mm f2.0 AI to test out what one friend of mine was getting for results. When used wide open, to about f4, the defocus
    areas where supper smooth. It also seemed like the resulting images showed a more abrupt fall off of the focus region, giving an
    almost three dimensional separation of the subject from the background. This lens I just got is in really excellent shape, and was
    very low cost, so time for some testing.
    The marked scales are a bit wider, and there are more number settings. However, with the short depth of focus at larger aperture
    settings, it may be tough to shoot from the hip with the 50 mm. I have done that often with my 35 mm and wider lenses, though much
    tougher with longer lenses.
    Thanks Brian!

    Ciao!

    Gordon Moat
    Alliance Graphique Studio
    <http://www.allgstudio.com>
     
    Gordon Moat, Sep 22, 2003
    #30
  11. Fine Art Photographer

    brian Guest

    In general, a colored reflection indicates a coated surface. In the
    case of the 50/2 I can see 4 colored and 1 colorless reflection on
    either side of the stop. The two colorless reflections are very dim,
    and are due to the cemented interfaces. One exception to this rule is
    the UV-Nikkor, which appears to be entirely uncoated because the
    single-layer coatings are optimized for the UV. AR coatings have
    certainly gotten better over the years, which would explain some of
    the appearance change between AI and AIS lenses.
    I agree that the 50/2 is a great lens which can be bought second-hand
    for incredibly little money. I got one in practically new condition
    for less than the cost of a dinner for two.
    Brian
     
    brian, Sep 23, 2003
    #31
  12. Fine Art Photographer

    Gordon Moat Guest

    Okay, I took another look at it, and I see the other reflections. At first glance, the coating at the front is the easiest to see, but
    at a slight angle, the others become more visible.
    Makes sense. Thanks.
    Yeah . . . about the same as I just paid for mine. Even the focus is still smooth. Just needed a little bit of cleaning on the barrel
    to get the numbers to come out brighter on the aperture and focus scales.

    Thanks again Brian.

    Ciao!

    Gordon Moat
    Alliance Graphique Studio
    <http://www.allgstudio.com>
     
    Gordon Moat, Sep 24, 2003
    #32
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.