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Old 09-11-2008, 03:32 PM
richard omeara
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c 11 g star focus

i have a c 11 ota with w/o 2speed focuser also a g star ex ccd. im having trouble geting focus with ccd.would a focal reducer help?THANKS ALL
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  #2  
Old 09-11-2008, 06:00 PM
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Kal (Andrew)
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You will need to use the OTA focuser to get rough focus before you use the w/o focuser
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Old 09-11-2008, 06:34 PM
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yep, you'll need to get it close using coarse focusing first, then go to the fine focuser for critical focus... Something bright like the moon/jupiter of venus is good to get you close, as even a fair way out of focus, these bright objects will show up as a really really big doughnut...

Just keep turning the coarse focus knob watching the display.. It will come to focus at F/10. Your field of view will be VERY narrow though... Very very narrow
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Old 09-11-2008, 11:07 PM
richard omeara
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focus

yep found the donuts.Thanks heaps alex and andrew.Weather report says clouds for a few days.But i got light through the C-11 and im pretty rapt.Going to invest in a coffee machine im really pushing midnight.
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Old 10-11-2008, 12:21 PM
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i've been pushing 4-5 am since i got my c11.. Its a killer. Then. 5am in the morning, its tear down time. It takes it out of ya but its worth it!
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