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Old 07-09-2020, 07:52 PM
Mickoid (Michael)
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Location: Melbourne, Australia
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Another M8

Caught this before the moon rose last night. Testing out my SW 150/750mm f5 Newtonian. A combination of UVIR and Multiband filters, 53mins made up of 40 secs and 90 secs 800iso subs unguided on a HEQ5 pro mount with a modded Canon 550d. Bortle 6 skies.

Had issues with the crayford dual speed focuser changing focus when tightening the focus locking screw. Any ideas on how to fix this?
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  #2  
Old 09-09-2020, 12:28 AM
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Ant0nio (Tony)
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Hi Mick, the 150 Newt shows great potential imo & a remarkable image given the lack of guiding. With regards to your focuser issue, I had a similar experience with a GSO crayford on my C8
& found that adjustment of the guide bearings on the top played a critical role in offsetting the focus lock thumbscrew on the bottom. The end result was less pressure was needed when applying the focus lock,
I also replaced the metal thumbscrew with a plastic one which seemed to add a degree of finesse as well. Most of these Chinese crayfords require some tweaking it seems.
Hope this info was of some use.
Cheers,
Tony
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Old 11-09-2020, 03:51 PM
topheart
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That's a nice image Michael!
Cheers,
Tim
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