Author Topic: My new adventure, astro photography.  (Read 367 times)

cheddar-caveman

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My new adventure, astro photography.
« on: Sep 07, 2020, 02:55:38 PM »
Got interested in this when I managed to photograph some of the recent Perseids meteors as they flared across the skies last month, now hooked! The single biggest problem with trying to photograph the stars is that there are feint, so to do so you need a long exposure time. That's the second biggest problem as the earth is rotating about it's poles which effectively makes the stars rotate so a long exposure gives them all tails especially when you zoom in for a closer look.
Example, bright star next to Milky Way, zoomed right out at 24mm for a wide view, looks OK.........

Now zoom in to 200mm for a closer look and see what happens, all the start grow "tails" due to their movement in relationship to the earth, both pictures taken with a 30second exposure....
This post is my opinion, which you may not like, but I'm entitled to it.
mjodeard@gmail.com
https://www.flickr.com/photos/63508234@N06/with/255625

klondike

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Re: My new adventure, astro photography.
« Reply #1 on: Sep 07, 2020, 03:27:13 PM »
Telescopes have a tracking mount. There are lots of creative pictures with very long exposures based on those trails - usually they have the pole star central so you get part circles.
So long and thanks for all the fish

cheddar-caveman

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Re: My new adventure, astro photography.
« Reply #2 on: Sep 07, 2020, 05:29:41 PM »
Yes I have a mount coming, hopefully this week, which will track the stars and therefore remove the tails. As you say though, point at the North Pole, long exposure and you get circles made b the stars.
This post is my opinion, which you may not like, but I'm entitled to it.
mjodeard@gmail.com
https://www.flickr.com/photos/63508234@N06/with/255625

Flying bomb

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Re: My new adventure, astro photography.
« Reply #3 on: Sep 08, 2020, 05:45:59 AM »
Some time ago I photographed galaxies. I got cheesed
off though because the moon
stops one doing it when in the night sky every month
for many nights and clouds, which are frequent, disrupt
the tracking software and mount.
If the Buck stops here how can the Doe go all the way ?



Albert.