Show me your DSLR noise and amp glow

[cometcatcher]

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.

[raymo]

One good turn deserves another.
1 dark frame, 1100D, 10 mins, 1600 ISO, approx. 21.5 Degrees ambient.
raymo

[cometcatcher]

Thanks very much Ray! Wow that's really quiet.

[JohnG]

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

[raymo]

Yes, I never heard a sound for the whole 10 mins.:lol::lol:
raymo

[cometcatcher]

Thanks John, that's even quieter! What was the ambient air temperature?

[JohnG]

Around 18.5c I believe, inside the house.

[SimmoW]

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!

[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.

[BruceG]

Hey Raymo and John, I can't see anything in your pictures.
Didi you do something wrong? haha....

[raymo]

Har Har, that's as silly as my post.
raymo

[SimmoW]

Ha, here are my best 3 astrophotos I've ever taken :rofl:

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.

[Camelopardalis]

Wow my cam is way noisier than that :sadeyes:

This is just a 10 minute exposure at ISO1600 with any lens on (and the lens cap ) ?

[SimmoW]

Yep, in fact my 40d shots were with no lens , just the bayonet cover on.

[Camelopardalis]

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.

[gregbradley]

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.

[SimmoW]

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.

[Star Catcher]

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

[SimmoW]

very good results. Now, if only someone with an SBIG 8300 cam chimed in...

[JohnG]

Whilst it is not 600 seconds, here is a Dark of 30 minutes @ -20c with a Moravian G2-8300.

[SimmoW]

Wow that was quick, thanks. Very good dark!

[cometcatcher]

Thanks for all the responses! Very informative. Out of the non cooled cameras, looks like the newer models are getting better with noise.

[SimmoW]

Well thanks for starting the thread!

If anything, it makes a compelling case for CCDs. By the time you pay for one of the latest SLRs and modding, a little bit more and you're in dark Ccd territory