[UV] Guess which is the quartz lens...!?

Discussion in 'Night, InfraRed, and UltraViolet Photography' started by kds315, Apr 4, 2007.

  1. kds315

    kds315

    487
    May 30, 2006
    Dr Klaus Schmitt
    This is a test shot to compare a Fluorite/Quartz lens with a "normal" lens for UV photography. The shots show one each per row. All done at f8 and using the new UG11xx Baader filter for the UV shots. The images are cropped/sized for about the same size for comparison. Focus was NOT completely identical.

    And your guess is? Would you consider both lenses for shooting UV or just one of them??

    76654752.jpg

    [Nikon D70 + Baader UG11xx + lens. UV shot about -10EV compared to VIS shot, identical postprocessing and resize for same appearance due to different focal length]
     
    Last edited by a moderator: Apr 5, 2007
  2. kds315

    kds315

    487
    May 30, 2006
    Dr Klaus Schmitt
    and a second example:

    76654753.jpg
     
  3. Normal - Quartz. Of course I have no knowledge of UV photography but thought it would be fun to guess. Lovely images.
     
  4. kds315

    kds315

    487
    May 30, 2006
    Dr Klaus Schmitt
    Thanks Gordon!

    Would you be so kind, if you have the time, and evaluate both lenses from your personal viewpoint a bit more detailled - I would like a second opinion...
    Here and here are high resolution images.

    Thanks, Klaus
     
    Last edited by a moderator: Apr 4, 2007
  5. Chris101

    Chris101

    Feb 2, 2005
    Arizona
    The lower images are in much better focus. I will guess that is a result of a better spectral window provided by the quartz lens.
     
  6. charliec

    charliec

    327
    Jan 17, 2006
    los angeles
    my guess is the upper set is the quartz. they seem to have more contrast and more detail than the lower set. I assume post processing was the same on the upper and lower pictures.

    however there seems to be more of a focus shift on the upper set which would make me think that is the normal lens.

    tough call.

    i would definetly use both for UV shooting.
     
  7. JoeG

    JoeG

    469
    Nov 2, 2006
    Tyrol, Austria
    My guess is, that the upper photos are shot with the quarz lens. It looks sharper and has more contrast.

    is the post processing on both the same?

    difficult...
     
  8. kds315

    kds315

    487
    May 30, 2006
    Dr Klaus Schmitt
    Just added tech. notes, same postprocessing done, cropped/resized due to different focal lengths.
     
  9. kds315

    kds315

    487
    May 30, 2006
    Dr Klaus Schmitt
    More examples shot with the "normal" lens, here the "classic target":

    76741186.jpg

    76741188.jpg

    Details (100% crop):

    76741196.jpg

    76741198.jpg
     
  10. kds315

    kds315

    487
    May 30, 2006
    Dr Klaus Schmitt
    ... and more:

    76741210.jpg

    76741211.jpg

    Details (100% crop, 90 degree rotation):

    76741322.jpg

    76741323.jpg
     
  11. kds315

    kds315

    487
    May 30, 2006
    Dr Klaus Schmitt
    ... some Myosotis finally:

    76741208.jpg

    76741209.jpg

    76741214.jpg

    76741215.jpg
     
  12. kds315

    kds315

    487
    May 30, 2006
    Dr Klaus Schmitt
    Btw. the first row was shot using the fluorite/quartz lens (Coastal Optics), congrats to the ones who got this right!
     
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