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    chris1964's Avatar
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    Default wide field photos



    Hi all. Here are some photos I took last night using a Nikon D60 and tripod, my first attempt at this type of photography. The first photo is Cenraurus and Crux region (ISO1600, f5.6, 10sec). The second is of course Orion (same settings). The third -my favourite- is the constellation Leo (ISO 1600, f5.6, 20sec).
    This is obviously a big learning curve for me and I welcome any comments on how I can improve. The hardest thing I think is manual focus. Overall I am pleased with how they turned out. 20 second exposures and ISO 1600 seem to be the best setting but I will continue to experiment with different settings.

    Chris
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    Dublin sky watch (03-28-2011),jrkirkham (03-28-2011)

  3. #2
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    Default

    Hi Chris.
    Really lovely wide field shots.
    To get sharper focus is always going to be the difficulty in AP.
    One tip in getting focus is to turn the focus ring all the way to what looks like the figure 8 on its side. This is the infinity symbol.
    When it can turn no more past the figure 8 bring it back ever so slightly and it will give you sharp focus. Experiment with the practice.
    Declan.
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    Thanks Declan, I'll give it a shot, no pun intended

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    Hello Chris 1964,

    a nice trial you have made, thanks for sharing. You have possibly a zoom lens on your Nikon D60. Check please, if you can get the manual focus lenses screwed on it. The higly opened lenses (f1.4) give better signal to noise ratio on most chips in amateur cameras.
    There are two popular mf-Nikons for astrophotography, I have been also using many years ago: 1.4/50mm and even a better one, 1.4/85mm. They have been disclosed, but are available as used items in lots of shops worldwide.

    Enclosed find please a 25sec pic of the Milky Way: Scutum through M24, taken under my light polluted suburban sky with mf Nikon 1.4/50mm on Fuji 800 negative film. Your Nikon D60 would shoot even better pics!

    Best

    JG
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    Hey Chris, thanks for the pictures. These are exactly the types of wide angle shots I've been taking recently. I've been trying to image a number of different constellations. I've been putting mine into a powerpoint presentation. It is interesting that one can pick out more in these shots than one can with the naked eye. How many constellations have you imaged so far?
    Rob
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    Thanks JG. I have a 55-200mm zoom lens and did try it last night but could not achieve focus. Not sure what I'm doing wrong but I can't find the little infinity symbol on the lens to set proper focus. By the way, that's a beautiful shot of M24.

    Hi Rob. It is really amzing how many stars are apparent in these sort of photos than what one can see with the naked eye owing to light pollution. So far I have only imaged the three from last night - Orion, Centaurus and Leo - but I have more in my sights!

    Chris

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    Quote Originally Posted by chris1964 View Post
    Thanks JG. I have a 55-200mm zoom lens and did try it last night but could not achieve focus. Not sure what I'm doing wrong but I can't find the little infinity symbol on the lens to set proper focus. By the way, that's a beautiful shot of M24.

    Hi Rob. It is really amzing how many stars are apparent in these sort of photos than what one can see with the naked eye owing to light pollution. So far I have only imaged the three from last night - Orion, Centaurus and Leo - but I have more in my sights!

    Chris
    Hello Chris,

    it may happen that some of the zooms have different "infinities" for different focus length.

    You can find the infinity with autofocus by daylight on some very distant object. I would then take a tape to fix this position and switch from autofocus to the manual, or do it all in the manual mode.

    Wishing you much success

    JG
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    Chris,

    Sometimes when I process a picture taken like we are doing I can see the various Messier objects in the constellation. They aren't big or bright, but they are noticable. It is fun to realize that I may have captured 3 or 4 "M" objects in a single photo.
    Rob
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