Samsung SDC-435 = 8.5 seconds integration @ $153
Posted 06 April 2010 - 01:30 PM
So can the SSNR be turned off?
Of course you would have noise at X512, But I'm wondering if SSNR may see some of our Faint detail as Noise and try to remove it.
I think that SSNR off and cooling the ccd will probably result in the best image, especially in the summer when it's warmer, But I don't know this because I don't even have the camera yet....
For those interested in this camera, I will test it in these scopes:
16" F/3 with focal reduction it will be around F/2
10" Meade F/4 S/N probably around F/2.5
Celestron ST 102mm F/5 , around F/3
And I have a 50mm finderscope set up as a guide scope, it has a 1.25 adaptor so I may be able to get the Samsung 435 to come to focus with it so we can see if the camera will work as an E-Finder.
Posted 06 April 2010 - 02:25 PM
Posted 06 April 2010 - 02:28 PM
With Gain On, SSNR is OFF or ON and level from 1-31
I have to do some more testing to determine the best settings for the faint fuzzies, but with no IR filter on camera and no filter on the scope on m51 at x512, SDR on 4, I had to use the SSNR pretty high to get a usable image, but mostly due to light pollution.
I was surprised that with gain on HIGH, brightness turned up all the way, SSNR on 31, SDR on medium, I was able to get some nebulosity on m42 at 1/60th of a second, without too much noise ,with the neb filter on scope - granted it was in the mid 40's here last night, but that is pretty good at 1/60th of a second without being totally washed out in noise.
Posted 06 April 2010 - 02:33 PM
Posted 06 April 2010 - 03:14 PM
Posted 06 April 2010 - 03:53 PM
Oh yeah, that, forgot to mention that part. Sorry. SSNR would be rather pointless with gain off since the noise is virtually non-existent with gain off.
Gain has to be on for SSNR to function.
Posted 06 April 2010 - 04:17 PM
i located a real small fan that I'm sure would set on top of the camera with no side overlap. would like to use a external power supply like a battery pack with a off on switch. does anyone know where i could get something like this.
What voltage is the fan?
Posted 06 April 2010 - 08:26 PM
Posted 06 April 2010 - 11:31 PM
Posted 07 April 2010 - 07:30 AM
Posted 07 April 2010 - 08:09 PM
How are you attaching the mini fan to the camera?
Posted 07 April 2010 - 09:20 PM
just one more question. might be a dumb one but i would rather be safe then sorry. when installing the fan externally, do you place the fan where the air is being drawed out of the camera or in. don
The main goal is to evacuate the hot air out of the case.
If the fan is blowing air IN-TO the case, you need to provide an exit for the hot air.
If you are sucking the hot air OUT of the case, then you still need to provide a way to draw cooler outside air into the case, and then out the fan.
If you don't want to drill anymore venting/inlet holes, then just installing the fan and having it draw OUT the hot air will work as well, but you won't get the full benefit from the fan install...it's certainly better than nothing.
Posted 07 April 2010 - 09:31 PM
Posted 08 April 2010 - 09:20 AM
Posted 08 April 2010 - 10:38 AM
Did you put any extra air vent holes in, and if so where?
Thanks - Jamie
Posted 08 April 2010 - 11:53 AM
Posted 08 April 2010 - 01:15 PM
Posted 08 April 2010 - 01:16 PM
I would use the fan to pull air out of the camera.
Of course this is coming from a guy that doesn't even have, and has never even seen the camera, So my thinking may change later today when my camera arives.
Posted 08 April 2010 - 01:28 PM
What ever type of cooling I choose I will post Images.
I all ready have and have been testing Fans and a TEC cooler.
The problem, as I see it for TEC cooling, is there is no access to the back side of the CCD chip.... Big Problem...
So, I will be doing a lot of testing to see if TEC cooling will benifit the image with gain on high, at 8.5 seconds, in warm weather.
After seeing uncooled StellaCam images in warm weather, I think this camera will need to be TEC cooled to get the Max out of it in Summmer if using gain on high and full 8.5 seconds.
Posted 08 April 2010 - 04:43 PM
Posted 08 April 2010 - 08:11 PM
Posted 08 April 2010 - 09:53 PM
Posted 08 April 2010 - 11:30 PM