Thanks very much for that Michael, I will try those exposure times next
clear night - of which I get maybe 1 every 2 weeks at present :(
I've just purchased a 60AH deep-cycle battery for powering the
scope/camera, I hope this will clean up any power supply problems and
I'll see what effect this has on any background noise. I'm also hoping
the battery capacity should give me a maximum of 8 hours use, I sure
didn't fancy lugging the 120AH battery around (the damn thing should
come with wheels on) so I got the smaller one. In the UK Maplins can
supply a 240VAC inverter which I will use to power my laptop in the
field. Pity the Thinkpad uses 20V instead of 12V.

Chris

>----------
>Sent: 21 April 1998 09:33
>To: 'MAPUG Mail'
>Subject: [M]: RE: A 416 Piccy (M13)
>
>On Saturday, April 18, 1998 10:25 PM, Chris Heapy wrote:
>
>> I've just imaged M13 tonight, this is 4 stacked exposures of 25 secs
>> each. I seem to have a lot of noise in the background ...
>>
>> Chris
>
><snipped>
>
>I would not be too concerned at this time with the slight patterns
>at such low signal levels. Many 0400 chips produce these to some
>degree.
>
>
>
>--
>Michael Hart
>Husen Observatory
>
>

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