Quote:
Originally Posted by hotspur
Are there many people that have a finder guider?
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I'd say a few do yeah. It's very light and convenient. I've even guide the C11 at F/10 with it when I have the AO running. It works fine. Anything at 1200mm FL or under, no sweat. I guide with this setup always when using the hyperstar as well because my images scale is 3asp and guiding through the finder will give me +/- 2 arcsec on average so that covers my newt, ED80 and any refactor around 600/700mm.
Quote:
Originally Posted by hotspur
Have seen a lot.most seem to have the 72 mm megrez or similar for guiders,personally I can't see much point having a lot of money tied up in a guide scope.that never gets used for anything else,and the arrangement you
have weighs less.I like to have things as lean as possible on the mount.
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Weight was the issue for me. With my 5" newt I always guided with the ED80 piggy backed on top or vice versa. When I got the C11 I thought I'd try the guider rather than mounting again the ED80 on top. It worked so well I thought why not try it on the newt, then the ED80 itself. I haven't guided through anything else since.
Quote:
Originally Posted by hotspur
I see one chap who had the cheapest looking guide scope,(I think it cost $150),did the same job as the fellow next to him who had a elite megrez.
And there was no difference in the images.
Thanks for the information Marc,
Cheeers Chris
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PHD will guide fine. Calibrate at 3000ms calibration steps, then 0.15 pixel min deviation. You'll obviously have no problem finding a guide star. Ever.
Quote:
Originally Posted by marki
Marc, I thought from the distances you quoted for the FF that you must be using one of the TS optiks units (sold also as APM). I have had one for about 18 months and it does a very good job of getting the field flat as can be seen by your third pic. Love the amount of play you get with distance to the chip as well. I have found that mine works anywhere between 105 - 110mm on my FLT98CF with no real observable difference anywhere within that range. It worked best at 103 - 105mm on my 80mm (600mm) F6 apo though.
Mark
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Thanks for the info Mark.
I'll probably try again tonight as it looks like we might get some clear skies until 12:00pm tonight in Sydney.
