From: Mark Gaffney <markgaffney@me.com>

Date: August 27, 2009 4:46:41 PM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] gain vs frame rate

Hi Willie, 

Attached is one of my first attempts at Jupiter last year with a DBK 21 Imaging Source camera. This is a colour camera & is a little less sensitive as to resolution when focused than your DMK 21 (I must get one of these when I can!) In other words you should get a finer image than me with your DMK! My colour here is a bit too red I`m told. Also attached is a moon shot with a colour Flea 2 camera & 0.3 Mogg FR so you can see that quite precise focus is possible. My Flea 2 is 640 x 480 pixels or thereabouts although the pixel size is 7.4 microns as compared to 5.6 on the 21 series Imaging Source cameras. I`ve turned the settings on this colour camera to a grey colour-more veracity to actual reality than all my shots taken of the moon with the DBK. Both of these are with a C9.25 scope. 

Mark.

On 28/08/2009, at 7:01 AM, Willie Strickland wrote:

Thanks Alan, during this next week I am going to try some lunar
imaging and hope that it is more tolerant of my inexperience and
requires less expertise than Jupiter.

I have been viewing movies and reading all day and am a bit
overloaded. I am sure I just need to take more data and process more
data to get a better grasp. If you want to be a writer, you have to
write. I suppose the same is true for this art form (planetary
imaging) as well.

Willie Strickland
cwskas@earthlink.net

On Aug 27, 2009, at 2:33 PM, Alan Friedman wrote:

> On gain settings, I am very often working at levels above 900 in
> Astro IIDC. The DMK mono camera noise is quite manageable at these
> levels in my opinion. It really depends on the seeing and the
> subject whether it makes sense to drop to a lower frame rate and
> slower shutter setting to improve the signal in the individual frames.