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Thread: What's causing the poor image quality?

  1. #1

    Default What's causing the poor image quality?

    i tried taking pics of the 3/4 moon outside my place and i noticed the poor image quality even on the LCD which i confirmed on my computer. weird thing is, later images were of slightly better quality.

    the only settings changed were from P to M mode and exposure settings.

    first pic is an example of the bad pic

    last 2 were the better ones but still bad to me...






    Last edited by Murcielago; 30th April 2007 at 02:34 AM.
    [QUOTE=dan_1337;2947523]if it was painted white, it would cost twice as much as Sigma =P[QUOTE]

  2. #2
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    Default Re: what's causing the poor image quality?

    Perhaps a little more experimenting with the M mode will do the trick

  3. #3
    Member/Tangshooter zaxh81's Avatar
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    Default Re: what's causing the poor image quality?

    what has this got to do with nikon?

  4. #4
    Senior Member zac08's Avatar
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    Default Re: what's causing the poor image quality?

    Quote Originally Posted by zaxh81 View Post
    what has this got to do with nikon?
    Nothing....

    mebbe moving it to night photography would be better.

  5. #5

    Default Re: what's causing the poor image quality?

    he is most probably using a nikon camera.

  6. #6

    Default Re: what's causing the poor image quality?

    Auto ISO perhaps...

  7. #7

    Default Re: what's causing the poor image quality?

    I don't see any pictures..

  8. #8

    Default Re: what's causing the poor image quality?

    oh, did you forget to put a memory card in?
    It is the camera, not the photographer.
    my flickr - adamloh.com

  9. #9

    Default Re: what's causing the poor image quality?

    Quote Originally Posted by adamadam View Post
    oh, did you forget to put a memory card in?
    there's no need for sarcasm.
    [QUOTE=dan_1337;2947523]if it was painted white, it would cost twice as much as Sigma =P[QUOTE]

  10. #10

    Default Re: what's causing the poor image quality?

    hmmm...handheld or tripod?

    looks soft to me...
    camera & lens used? preferably settings used too..

  11. #11

    Default Re: what's causing the poor image quality?

    it's a D70s with 70-300mm VR lens.

    all images shot at 300mm
    1st shot
    f5.6 1/200
    EV +0.7 iso 200
    optimize image: vivid WB cloudy -3
    color mode: mode IIIa
    tone comp: auto hue adjustment: 0
    saturation: normal sharpening:auto


    2nd shot
    f8 1/250
    EV +0.7 iso 200
    optimize image: vivid WB cloudy -3
    color mode: mode IIIa
    tone comp: auto hue adjustment: 0
    saturation: normal sharpening:auto

    3rd shot
    f8 1/320
    EV +0.7 iso 200
    optimize image: vivid WB cloudy -3
    color mode: mode IIIa
    tone comp: auto hue adjustment: 0
    saturation: normal sharpening:auto
    [QUOTE=dan_1337;2947523]if it was painted white, it would cost twice as much as Sigma =P[QUOTE]

  12. #12

    Default Re: what's causing the poor image quality?

    Hmmm. Even if you're using a VR lens, did you use a tripod?

    Also, 300mm is not really good enough for crisp, sharp moon shots.

    I would disable your vivid color setting, as this tends to blow some highlights and is not useful for non-colorful targets like the moon.

  13. #13

    Default Re: what's causing the poor image quality?

    try using a tripod and a very slight faster shutter speed...
    Leica helps me calm down when i shoot.

  14. #14

    Default Re: what's causing the poor image quality?

    yeap.. i am using a tripod.

    ok will try removing vivid cols.
    [QUOTE=dan_1337;2947523]if it was painted white, it would cost twice as much as Sigma =P[QUOTE]

  15. #15

    Default Re: what's causing the poor image quality?

    Use the timer or the remote to minimise handshake while triggering the shutter.
    Since at 300mm, any handshake is magnified.

    Try shooting at smaller apertures for more DoF but when you do a 100% crop, some details are lost too. Maybe that's why you thought the image quality is poor since the moon didn't appear sharp to you.

  16. #16

    Default Re: what's causing the poor image quality?

    Quote Originally Posted by RtOaNn View Post
    Use the timer or the remote to minimise handshake while triggering the shutter.
    Since at 300mm, any handshake is magnified.

    Try shooting at smaller apertures for more DoF but when you do a 100% crop, some details are lost too. Maybe that's why you thought the image quality is poor since the moon didn't appear sharp to you.
    100% crop as in crop the photo at 100%size ?

    when viewed on the camera's lcd and on the computer's the quality was already like that before i cropped or anything.
    [QUOTE=dan_1337;2947523]if it was painted white, it would cost twice as much as Sigma =P[QUOTE]

  17. #17

    Default Re: what's causing the poor image quality?

    Quote Originally Posted by Murcielago View Post
    it's a D70s with 70-300mm VR lens.

    3rd shot
    f8 1/320
    EV +0.7 iso 200
    optimize image: vivid WB cloudy -3
    color mode: mode IIIa
    tone comp: auto hue adjustment: 0
    saturation: normal sharpening:auto
    Maybe try using ISO100?
    On a clear night, the moon is very bright, ISO100 should be enough.

  18. #18

    Default Re: What's causing the poor image quality?

    Quote Originally Posted by Murcielago View Post
    i tried taking pics of the 3/4 moon outside my place and i noticed the poor image quality even on the LCD which i confirmed on my computer. weird thing is, later images were of slightly better quality.

    the only settings changed were from P to M mode and exposure settings.

    first pic is an example of the bad pic

    last 2 were the better ones but still bad to me...


    http://img.photobucket.com/albums/v2.../moon_4009.png
    http://img.photobucket.com/albums/v2.../moon_4018.png
    http://img.photobucket.com/albums/v2.../moon_4019.png
    A likely reason is the presence of high clouds which you cannot see with your naked eye. This happens all the time to astrophotography especially in SG where clouds prevail.

    Since you used 70-300 on D70s, your images are probably cropped and your lens may not be sharp enough to resolve the moon surface also. The difference in quality you obtained with P mode and M mode may be due to the aperture in use also. Selecting f/8 or f/11 may give you a better image since most lenses are slightly better when stopped down a couple of stops.

    For example, this moon below is shot with D2X using 300/4 and resized to show the entire frame and the relative size of the moon within the frame. It's quite small.


    This is the crop. As you can see, even with more megapixels from the D2X, because the magnification due to the cropping is tremendous, the image is not really sharp because the lens was not able to resolve.



    This is the entire frame resized shot with D2X through a 1250mm SCT telescope around the same time. It already has so much more detail than the 300/4 because the lens is designed to give this kind of magnification.


    A crop from this image would yield something like this.. you can see that the focus is not spot on and there is some camera shake also. Again, this is pushing beyond the limits of the telescope.


    The absence of clouds helps in both cases, shot within minutes of each other.
    Last edited by lsisaxon; 30th April 2007 at 04:51 PM.

  19. #19

    Default Re: What's causing the poor image quality?

    Since you are using a tripod, did u off your VR? A stable tripod with the VR on can cause blurish pics.

  20. #20

    Default Re: what's causing the poor image quality?

    Quote Originally Posted by PsychoV View Post
    Maybe try using ISO100?
    On a clear night, the moon is very bright, ISO100 should be enough.
    Bro, the lowest ISO setting on the D70s is ISO200.

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