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27-06-2014, 11:18 PM
<--- Comet Hale-Bopp
Join Date: Jan 2005
Location: Cloudy Mackay
Posts: 6,542
Show me your DSLR noise and amp glow
Now that I have camera number 3 I am ever more curious what other DSLR cameras are like, or compare to the ones I have.
If I could be so bold to ask a big favour to those with various DSLR cameras to do a comparison for me by posting pics of your amp glow? To keep things equal I need a 10 minute dark frame at ISO 1600 at 22C or close to it. No pre processing other than to convert to jpeg. The reason I need these settings is to show the noise without stretching.
Here's mine. The old Nikon D70s is pretty bad. Even at 1 minute it glows and is noisy. The Pentax K-x is much better and more evenly distributed. The Pentax K-5 glows brighter than the K-x at the bottom right but less at the top left.
I'd really like to see what an 1100D looks like if any 1100 D owners can oblige.
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28-06-2014, 12:18 AM
Registered User
Join Date: Sep 2011
Location: margaret river, western australia
Posts: 6,070
One good turn deserves another.
1 dark frame, 1100D, 10 mins, 1600 ISO, approx. 21.5 Degrees ambient.
raymo
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28-06-2014, 03:52 AM
<--- Comet Hale-Bopp
Join Date: Jan 2005
Location: Cloudy Mackay
Posts: 6,542
Thanks very much Ray! Wow that's really quiet.
28-06-2014, 10:46 AM
Looking Down From Above
Join Date: Dec 2005
Location: Cootamundra, NSW
Posts: 1,711
As you asked so nicely
1 x Dark @1600 ISO, 600 seconds with a Canon 60Da.
1 x unstretched and one x stretched to the max..
Cheers
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28-06-2014, 11:02 AM
Registered User
Join Date: Sep 2011
Location: margaret river, western australia
Posts: 6,070
Yes, I never heard a sound for the whole 10 mins.
raymo
28-06-2014, 12:44 PM
<--- Comet Hale-Bopp
Join Date: Jan 2005
Location: Cloudy Mackay
Posts: 6,542
Thanks John, that's even quieter! What was the ambient air temperature?
28-06-2014, 12:57 PM
Looking Down From Above
Join Date: Dec 2005
Location: Cootamundra, NSW
Posts: 1,711
Quote:
Originally Posted by
cometcatcher
Thanks John, that's even quieter! What was the ambient air temperature?
Around 18.5c I believe, inside the house.
29-06-2014, 11:39 AM
Farting Nebulae
Join Date: Jan 2014
Location: Tamleugh, Victoria, Australia
Posts: 1,405
This is a good thread, quite interesting to see all the results.
pouring with rain right now, nice and cozy in my 21c house, so I'm baking a sub for you right now!
29-06-2014, 12:08 PM
Farting Nebulae
Join Date: Jan 2014
Location: Tamleugh, Victoria, Australia
Posts: 1,405
Ok here are my 2 examples.
The first horrid one is ISO1600 unstretched, the second better one is 400. Hmm, I might try 400 in my shots...
it'd be nice to see some of the $10,000 CCD guys post similar examples. And a Canon 5D mk 3, and a few Nikons.
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30-06-2014, 02:20 PM
Registered User
Join Date: Mar 2013
Location: Blue Mountains, Australia
Posts: 367
Hey Raymo and John, I can't see anything in your pictures.
Didi you do something wrong? haha....
30-06-2014, 03:28 PM
Registered User
Join Date: Sep 2011
Location: margaret river, western australia
Posts: 6,070
Har Har, that's as silly as my post.
raymo
30-06-2014, 03:43 PM
Farting Nebulae
Join Date: Jan 2014
Location: Tamleugh, Victoria, Australia
Posts: 1,405
Ha, here are my best 3 astrophotos I've ever taken
Canon EOS 5D Mk I I I
1600, 800 and 400. Very pleased! I gotta start using this baby!
The original pics appear better than here, as usual. Much less noise pattern.
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30-06-2014, 06:09 PM
Drifting from the pole
Join Date: Feb 2013
Location: Brisbane
Posts: 5,460
Wow my cam is way noisier than that
This is just a 10 minute exposure at ISO1600 with any lens on (and the lens cap ) ?
30-06-2014, 06:30 PM
Farting Nebulae
Join Date: Jan 2014
Location: Tamleugh, Victoria, Australia
Posts: 1,405
Yep, in fact my 40d shots were with no lens , just the bayonet cover on.
30-06-2014, 06:53 PM
Drifting from the pole
Join Date: Feb 2013
Location: Brisbane
Posts: 5,460
This is my miserable attempt... Canon 1100D at ~21.5C ISO1600 600s with all noise-reduction functions disabled.
When I look at the actual raw image in Canon tools, the coloured pixels are more saturated.
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01-07-2014, 02:32 PM
Registered User
Join Date: Feb 2006
Location: Sydney
Posts: 18,032
Quote:
Originally Posted by
SimmoW
Ok here are my 2 examples.
The first horrid one is ISO1600 unstretched, the second better one is 400. Hmm, I might try 400 in my shots...
it'd be nice to see some of the $10,000 CCD guys post similar examples. And a Canon 5D mk 3, and a few Nikons.
FLI Proline 16803 1x1 binning -30C 600 second master dark, I boosted it in Photoshop like I normally would do to a light exposure. The jpeg is a bit small, there are some hot pixels in there but its also pretty clean.
Greg.
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01-07-2014, 02:38 PM
Farting Nebulae
Join Date: Jan 2014
Location: Tamleugh, Victoria, Australia
Posts: 1,405
That's more like it! I can't see much right now on my mobile phone, but it looks like you forgot to turn the camera on! :-)
Can u post the unstretched version, so we can all have a cry?
This is proving to be a great testing resource.
01-07-2014, 11:46 PM
Registered User
Join Date: Feb 2006
Location: Bankstown
Posts: 981
Hi
Here are some darks from a Canon 6D. No stretching or noise reduction.
Starting with ISO1600 on left through 800 and then ISO400 on right. Temperature about 20C.
Ted
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04-07-2014, 03:02 PM
Farting Nebulae
Join Date: Jan 2014
Location: Tamleugh, Victoria, Australia
Posts: 1,405
very good results. Now, if only someone with an SBIG 8300 cam chimed in...
04-07-2014, 03:29 PM
Looking Down From Above
Join Date: Dec 2005
Location: Cootamundra, NSW
Posts: 1,711
Whilst it is not 600 seconds, here is a Dark of 30 minutes @ -20c with a Moravian G2-8300.
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