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Author Topic: f8 8 inch orion optics dob 1/10 pv  (Read 1189 times)

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Offline clive

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f8 8 inch orion optics dob 1/10 pv
« on: 20:20:11, 13 July, 2015 »
hello every one  im thinking of purchasing a f8 8 inch orion optics dobsonian mounted 1/10 pv  telescope an 8 inch will resolve 0.6 arcseconds what i was wandering will this scope will this f8 1/10 optics resolve moor or will it be the same at 0.6 arcseconds ive been useing my 8 inch sky watcher f6 to look at saturn when the seeing s good but it wont show the encke gap so ive read i need a minimum of 9 inches to resolve the encke gap  ill be useing the 8 for observing moon and planets  thanks

Offline ChrisLX200

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Re: f8 8 inch orion optics dob 1/10 pv
« Reply #1 on: 20:42:14, 13 July, 2015 »
What you will get is slightly better contrast (with a smaller secondary and assuming the OTA is otherwise optimised and flocked). That may enable you to see better detail, but at the expense of a longer tube. f/8 is more forgiving of achieving accurate focus and eyepieces too. I doubt your local 'seeing' will support 0.6 arcsec directly but it's amazing what you can do with a webcam and 'lucky' imaging.

ChrisH
Chris Heapy - current: 10-Micron GM2000HPS-II U/P, G11/Gemini, TV NP127is, Altair 8" RC, TV Genesis SDF, TV Pronto, SW Equinox 80ED, 10" LX200, 12" f/5.4 Newt, Vixen 90mm.
Atik 490EX, Atik EFW, Baader LRGB filters, Astrodon 3nM NB filters, Lodestar, QHY5L-II all-sky, Canon 70D and 350D
Whirley Obs., MPC Code Z89

Offline clive

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Re: f8 8 inch orion optics dob 1/10 pv
« Reply #2 on: 21:49:38, 13 July, 2015 »
thanks chris

 

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