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Old 02-27-2012, 11:59 AM   #241
JEL
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Northern star-trail.

Photo date: 20120227 02:40-03:16 UTC (03:40-04:16 local)
Frames: 1
Dark frames: 1
Exposure time (each single image): 2170 sec (36m10s), ISO-100, f/8, focal length: 10 mm
Camera: Canon EOS 60D
Lens: Tamron SP AF 10-24 mm F/3.5-4.5 Di II, model B001E
Software used: DPHDR 5, Gimp 2.6.11

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Old 02-27-2012, 09:19 PM   #242
Unstung
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JEL, is there an accurate way to meter that scene without guessing the exposure? Half-an-hour is a pretty long time, too long without using the bulb mode or CHDK.
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Old 02-28-2012, 07:58 AM   #243
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I just go by trial&error, and then keep the best pictures. In my experience; at f8/iso100 +- 10 minutes doesn't seem to make any major difference with these types of night-images.
It's taken in bulb-mode, and then the contrast was processed (I'm a bit worried about that CHDK thing, so I haven't tried using that yet)
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Old 02-28-2012, 12:05 PM   #244
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Not sure if you know that or not or if you use it or not, but you can use a filter that filters out Sodium light. That way, the sky won't be as orange and less of the light from street lights will make it to the image.

The filter should be very narrow band, so it doesn't block out the rest of the light.
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Old 02-28-2012, 05:18 PM   #245
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Thanks, I'll look into that
I'm not using any filters currently, and I do get a lot of orange from the street-lights on long exposures. Green from some of them actually, and orange from others (there are different types of lights located around the water-tower, and they're never turned off at night). The orange ones are the most powerful/dominant though.
Thanks for the tip
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Old 03-15-2012, 01:52 AM   #246
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Webcam + small telescope = terrible photo of Saturn:

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Old 03-15-2012, 02:06 AM   #247
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That's actually pretty good. You should give Mars a whirl.
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Old 03-15-2012, 02:13 AM   #248
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Quote:
Originally Posted by Codz View Post
 That's actually pretty good.
Don't mean to be bashing NovaSilisko here for his attempt, but how on Earth can you say it's pretty good? You can't even tell it's Saturn.
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Old 03-15-2012, 02:15 AM   #249
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Quote:
Originally Posted by RisingFury View Post
 Don't mean to be bashing NovaSilisko here for his attempt, but how on Earth can you say it's pretty good? You can't even tell it's Saturn.
I mean if he's using a small telescope.(65mm-90mm) Considering the equipment he's using, it's pretty good.
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Old 03-15-2012, 04:29 AM   #250
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You think that's bad. Imagine what Galileo had to deal with when he actually described in fine detail how Jupiter was? It's amazing how he can see with such primitive telescopes back then. He even managed to see Jupiter's four big moons.
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Old 03-15-2012, 05:28 AM   #251
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Quote:
Originally Posted by Codz View Post
 I mean if he's using a small telescope.(65mm-90mm) Considering the equipment he's using, it's pretty good.
Yeah, 90mm Maksutov Cassegrain. I can make out the rings easily just looking through it normal, as well as the bands (and moons) of jupiter, but my less-than-optimal-quality camera didn't agree.

---------- Post added at 12:28 AM ---------- Previous post was at 12:17 AM ----------

Also, the only reason it's even vaguely oval shaped is due to me accidentally rotating the scope as I reached over to click the button to take a picture.
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Old 03-15-2012, 07:41 AM   #252
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I tried the same with a 127 mm Maksutov and I couldn't
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Old 03-15-2012, 08:13 AM   #253
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Well then, TIL webcams make terrible astrophoto cameras
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Old 03-15-2012, 08:56 AM   #254
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Quote:
Originally Posted by NovaSilisko View Post
 Well then, TIL webcams make terrible astrophoto cameras
No, I've seen people use them with quite good quality, it just takes a bit of effort.
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Old 03-15-2012, 09:44 AM   #255
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Quote:
Originally Posted by RisingFury View Post
 No, I've seen people use them with quite good quality, it just takes a bit of effort.
More effort than my method of "hold camera in left hand, press button on laptop five feet away to take picture"? That seems unlikely
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