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DPChallenge Forums >> Tutorials >> An Astrophotography Primer
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Showing posts 26 - 33 of 33, (reverse)
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02/06/2008 05:37:57 PM · #26
Originally posted by brownsm:

I would think that hyperfocal distance can help here! At f5.6 and 17mm, the hyperfocal distance is just about 7 feet. that means that everything from 3.5 ft to infinity is sufficiently focussed. I've printed out a hyperfocal chart and now keep it in my camera bag.

edited distance to account for APS-sized sensor instead of FF


You'd think hyperfocal rules would work, but you'd be surprised just how liberal the standard hyperfocal calculations are with the definition of "in focus," In practice, the technique that John refers to a few posts back (shoot, review at high magnification on LCD, tweak, reshoot...) is required for critical focus, even with WA lenses.
09/18/2012 06:04:29 AM · #27
Do you have any specific formula to follow here? I'm planing to do some star trails and I'm not worried about the sensor over heating or the battery running out cause I'm using film.

Thanks :)
09/18/2012 12:30:04 PM · #28
This is a pretty old thread, but maybe somebody can help me out. When I shot my moon for the recent moon challenge, I just held my lens up to the eyepiece and snapped the shutter. I have an 8" dobsonian telescope. I used the 24-105 f/4L and a 30mm eyepiece.

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The moon however isn't nearly as nice as what I saw with my eye looking through the telescope. And even with my widest eyepiece I had a very difficult time getting the whole moon in the shot.

I know with the dobsonian I won't be able to do galaxies and nebula's, but would like to get better moon and planet shots. So I'm guessing I need to invest in some sort of mount for my rebel, but unsure which method would work best, prime focus or projection.

Mostly, I want to capture what I see when looking at the full moon through my 16mm 100° eyepiece, and Jupiter/Saturn through my 5mm or 7mm eyepiece.

09/18/2012 01:21:06 PM · #29
For some....you don't need a telescope to capture galaxies.
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Not the best, but this was the first time I was using a piggyback mount and just wanted to try it out.

I'll respond to your specific questions in a bit....gotta run at the moment.
09/20/2012 10:33:48 AM · #30
Check out the winners of Astronomy Photographer of the Year 2012;

//www.bbc.co.uk/news/science-environment-19637073
09/20/2012 12:56:41 PM · #31
Drat! I thought this was an astrology primer for tonight's zodiac challenge!
09/20/2012 03:01:52 PM · #32
I thought you might have been the one to start this post! Nice job...as usual.
09/20/2012 03:04:36 PM · #33
Aren't some of those pictures on your wall?
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