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Old 26-06-2008, 06:43 PM
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monoxide
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Join Date: Oct 2006
Location: Adelaide
Posts: 658
i wasnt trying to imply that the gso 10:1 was a high quality focuser just that it would more than likely be easier to drill 4 holes and bolt it on and have it come to focus rather than getting bits machined to fit a standard skywatcher focuser only to upgrade it to a 10:1 later on anyway.

the low profile version may not be perfect or buttery smooth but you have to expect that for $100, the low profile wouldnt come to focus on my newt so i ended up swapping the 10:1 part over to my standard gso focuser, the result when i added motofocus was impressive giving me VERY fine focus control. plus when it comes to imaging id rather be exposing than tweaking focus by hand then waiting for the vibration to settle before inspecting again, now instead of guessing focus by eye i can watch the FWHM on the laptop screen and within 1 minute i know my focus is as good as its going to get.

you could argue that for the price of the gso 10:1 + motofocus you could get a JMI but i can guaruntee that it would be a lot harder to focus with the non motorised JMI even if it is of a better quality than the gso.
i should also mention that if you are into planetary observing, a setup like i mentioned can make a massive difference in the detail visible, only after seeing this did i realise how much of a difference it really did make.
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