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Post by davy on Dec 5, 2013 21:18:38 GMT
Well im still getting hassle trying to get focus on dso on constellations with my ed80...weather not constant to test settings. .can get th e the moon smashing but anything else not a sausage.. Set up ed80..pd1.... .5 focal reducer..ir filter......have barlows..70mm focal tube..star diagonal. .just cant get stars..wae this...getting depressed now as can visually see stars even with horrendous lp..dont want to go dark site and freeze the () off testing .... Even had dslr on and could see star's. ..
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Post by Deleted on Dec 5, 2013 21:51:40 GMT
If it helps Davy the last time I was out to get a focus on stars I set to shutter manual at X16 integration to get stars to appear. The moon only required 1/700 speed but both were in focus. Try Polaris as it dosnt move so no need to setup fully and try a focus on it. Unfortunatley I dont have the ed80. Ken may know better
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Post by Dragon Man on Dec 7, 2013 12:13:38 GMT
I have never had any trouble getting my ED80 to focus, whether I have used it native, with a 0.7x FR, a 5x FR, or with a 2x barlow (and extension tube).
I leave the camera set at 128x when I focus, and if I can't get it nice by eye I use a bahtinov mask. I use an Electric Focuser (stuff going outside).
I use a bright star, and focus on that. I can't see that you could be doing anything wrong Davy.
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Post by davy on Dec 7, 2013 17:17:20 GMT
Probably as you say ken need to try for a bright star..ive set it up from scratch ..pd1..c to t adapter..t to 40mm focaltube..to focusser adapter..scope..sense up to 128..can focus on a bright roadside light a mile away in the pitch dark.tried mask on smidgin out on mask but as close as by eye..can even view bushes below it on screen no probs...cant see a thing in finder..so must be good....the lp im getting would be in comparison to a major football stadium floodlit pitch. .weather very poor ,,zero visibility low cloud slight drizzle of rain off n on..need a dark clear night....
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Post by Dragon Man on Dec 8, 2013 5:32:00 GMT
You would be surprised at the difference between focus on a light a mile away and a Star.
I sometimes check my Finderscope alignment and main scope on trees about 5 miles away from me, yet when I go to a star at night it is at a different focal point.
Yeah, a clear night will help you.
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Post by davy on Dec 8, 2013 12:42:18 GMT
Because of hills can only get roughly four miles of distance. .unfortunately
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Post by Dragon Man on Dec 8, 2013 14:50:32 GMT
Because of hills can only get roughly four miles of distance. .unfortunately That's OK Davy, you only need to see about a mile away. But when you point at a star it will need a slight refocus. If you can get focus right when using a street light or whatever about a mile away, when you look at a star you should see a blurry ball at worst. Or an almost focussed star at best. A mile gets you pretty close to star focus.
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