64308Re: New to group - looking for help
- Jan 1, 2009Hi Mark,
Using my LX90 Classic (8" SCT), I was always more than happy with the
star shapes in unguided images of up to 90 seconds - pier-mounted, in
an observatory, with non-permanent PEC and a customised Tracking Rate.
Even then I would have to be prepared to 'throw-away' maybe 1 in 6
exposures if I hit a 'bad patch' on the worm. And that was,
obviously, using the LX90 tas the imaging OTA
Using the LX90 as an autoguider for an ED80, I can run right up to 10
minutes with NO lost frames whatsoever (unless caused by other than
tracking errors). And that is with NO PEC or TR corrections, just 2-
second guide exposures on the 8"SCT at full f/10.
I may even be able to go 'longer' than 10 minutes - I just have not had the patience to try !!
Cheers, and a Happy New Year from Cloudy Scotland
--- In firstname.lastname@example.org, "Mark de Regt" <deregt@...>
> > Finally, you should be able to image without any guiding for 60 -
> > seconds.decent
> I have a very fine example of the LX200. I think I got pretty
> results when imaging with that scope, both with and without the AO-7. But
> there's no way that I could get decent results, unguided, with 60second
> images. If my guide interval was more than one second, I could seethe
> degradation.question of
> I suppose that "able to image without any guiding" punts on the
> what kind of results are acceptable. For me, guiding, withrelatively short
> guide intervals, was an absolute necessity for getting decentresults with
> my LX200.
> --Mark de Regt
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