NewtonianReflector at Yahoo! Groups

Dust storm progenitor on Martian polar cap

jnassr2000 — Thu, 04 Feb 2010 00:35:30 GMT

Hi, A relatively large dust storm that originates from Utopia is blowing across the north polar cap. It is evident in the above February 1 image and trails off

Re: Carbon Fiber Newtonian Tube

Wally Lucas — Tue, 02 Feb 2010 21:11:56 GMT

Amen--my Coulter Odyssey (13.1" mirror) is a devil to collimate...however one can seldom get pinpoint star images through such a large aperture s good seeing

Carbon Fiber Newtonian Tube

patconlon — Tue, 02 Feb 2010 20:55:05 GMT

Wally I also have a 12 inch F5.3 reflector which I am not useing at the moment I could never get the damn thing collimated properly my fault Im sure, also

Carbon Fiber Newtonian Tube

patconlon — Tue, 02 Feb 2010 20:36:58 GMT

Hi John I am not a big fan of barlows so its just the set focal length although I do have a 2x barlow which I use sometimes , eyepieces 25mm and 10mm meade

Re: Carbon Fiber Newtonian Tube

Wally Lucas — Tue, 02 Feb 2010 15:09:01 GMT

Well, far be it for me to argue with you--as you seem to have an instrument that works superbly when viewing them. This is probably because of the long

Martian adventures with XO first light

jnassr2000 — Tue, 02 Feb 2010 02:08:51 GMT

Hi, I finally received my long awaited Pentax 5mm XO eyepiece with much anticipation and excitement! The strong seasonal trade winds that disturb steady seeing

Re: Carbon Fiber Newtonian Tube

john nassr — Tue, 02 Feb 2010 00:50:08 GMT

Pat, A 12" tube for a 10" mirror should do very well in the cooling department. Vibration free maglev cooling fans are also mandatory to speed up the process.

Carbon Fiber Newtonian Tube

patconlon — Mon, 01 Feb 2010 23:08:03 GMT

Wally thanks for the reply most people would agree with you in using a refractor for double stars but I have two scopes a 6inch reflector and a 4 inch

Re: Carbon Fiber Newtonian Tube

Wally Lucas — Mon, 01 Feb 2010 20:59:29 GMT

If I may--I have two large reflectors (8" & a 13"). I enjoy using both and have a warm fuzzy feeling using them, however they are not a good choice to view

Carbon Fiber Newtonian Tube

patconlon — Mon, 01 Feb 2010 20:48:37 GMT

John I was thinking of a 10 inch F8 scope and making the tube 12 inches in diameter do you think I should make it wider. I will be using it mostly for double

Re: Carbon Fiber Newtonian Tube

john nassr — Mon, 01 Feb 2010 14:20:48 GMT

Pat, What size mirror and focal ratio are you thinking of? What do you intend to use the scope for? John ... From: patconlon Subject:

Carbon Fiber Newtonian Tube

patconlon — Mon, 01 Feb 2010 12:08:09 GMT

Hi John thanks for the information shuld be helpful I notice that your tube is 20 inch ID. yet your mirror is 16 inch do you think wider tube better for tube

Re: Carbon Fiber Newtonian Tube

john nassr — Sun, 31 Jan 2010 13:04:18 GMT

Pat, I bought the tube from Frank Uroda. He specializes in carbon tubes for scopes.He did an impeccable job on mine and it was a true pleasure doing business

Carbon Fiber Newtonian Tube

patconlon — Sat, 30 Jan 2010 14:53:45 GMT

HI John thats one nice looking scope you have there did you buy the tube or make it,how thick is the tube walls its about 70inches long and you have no

Re: Carbon Fiber Newtonian Tube

john nassr — Sat, 30 Jan 2010 00:56:05 GMT

Pat, My home built scope's native focal ratio is f/4.5. My Groups picture folder was somehow deleted..... Anyway I just uploaded a new photo folder named "John