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Bottom of the moon?

Discussion in 'Creative Corner' started by hmpws, May 29, 2010.

  1. hmpws

    hmpws Mu-43 Regular

    Apr 24, 2010
    Auckland, New Zealand
    Here is a picture I took of the moon with my Minolta 135mm, when the moon was sky high.

    The lens is obviously not long enough, and here is a many many % crop of the original:

    <a href="http://www.flickr.com/photos/tonytse/4704418803/" title="_1040532.jpg by ttse007, on Flickr"> View attachment 145329 "500" height="500" alt="_1040532.jpg" /></a>

    My question is what causes the "texture" along the bottom of the moon? Is the lens reaching its diffraction limit?
  2. CalebPhotographer

    CalebPhotographer Mu-43 Regular

    Apr 1, 2010
    There is less light at the bottom of the moon, and your shot is correctly exposed for that portion of the moon so the details in the craters stand out.
  3. Djarum

    Djarum Super Moderator Subscribing Member

    Dec 15, 2009
    Huntsville, AL, USA
    Yup. Your moon shot is slightly over exposed.
  4. hmpws

    hmpws Mu-43 Regular

    Apr 24, 2010
    Auckland, New Zealand
    Thanks for the comments. I will try again tonight if the weather is nice enough, i find that this is kind of hard to do this well on the LCD though.
  5. Grant

    Grant Mu-43 Veteran

    That part of the moon is not fully illuminated it is partially in shadow hence the texture.
  6. Bokeh Diem

    Bokeh Diem Mu-43 Top Veteran

    Mar 14, 2010
    Try bending over and shooting backwards through your legs for a better moon effect.

    Oops. Back to lurking now.

    Bokeh D
  7. CalebPhotographer

    CalebPhotographer Mu-43 Regular

    Apr 1, 2010
    You can change the metering to take from the center, and then adjust the EV+/- to compensate.
  8. georger

    georger Mu-43 Regular

    May 28, 2010
    Low grazing angles of Sun illumination enhances Moon’s topography on the edge (bottom on your picture). With a higher magnification you would be able to see separate mountain peaks. See attached photo I copied from the Web.

    Attached Files:

    • Like Like x 1
  9. ianc

    ianc New to Mu-43

    Jun 30, 2010
    Essex UK
    Exposures for the moon are pretty easy, put the camera in shutter priority mode and set the shutter speed to 1/125th second for a full moon, bracketing 1 stop either side can be a good idea as well.

    The edge markings are the surface texture as pointed out above.

    You could also attach your camera via a T mount and nose piece instead of the eye piece in a telescope, you can use an ordinary tripod as with the shutter speeds mentioned its still enough to freeze any motion.

    The below shot was taken using a 1.3mp webcam type camera and a celestron 6" telescope, I purposely darkened the shots so the surface brightness wasn't a problem, its a mosaic of 3 shots @F10.

    Subscribe to see EXIF info for this image (if available)
  10. ChristopheG

    ChristopheG Mu-43 Regular

    Jun 4, 2010
    Wondering it is looks amazing. Really I would like to say your work is very nice.
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