[Aavso-photometry] CCD Cameras - Advice wanted!

[Jim Jones]

You can purge the SBIG ST series cameras yourself.  You really don't 
purge them, you dry the desiccant. Not a big deal.

You may be able to do the same thing with the other SBIG cameras 
yourself but I'm not sure.

Jim Jones

Michael Crook wrote:
> Hi Folks,
>
> Hope you all had a good Christmas!
>
> I've noticed a 'wierd' pattern on my recent CCD images
> and on closer inspection I can see what appears to be
> tiny droplets of water appearing on the actual chip -
> which then freeze as the chip cools.
>
> I've been advised my camera  - a FLI Maxcam, will need
> to be re-purged which will mean sending it back to the
> manufacturer in the USA (I'm in the UK). This is going
> to be expensive, and I've also been advised that I may
> need to keep doing this every couple of years or so.
>
> My questions are - 
>
> 1) Is there anything I can do myself to prevent the
> moisture forming?
>
> 2)Are there any cameras suitable for photometry which
> don't have to be re-purged periodically? It may be
> cheaper in the long-run for me to get a different
> camera! The scopes I use are 6" and 9.25" SCTs at F6.3
>
> Many thanks,
>
> Mick Crook
>   
>
>
>   
>
>
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