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Posts Made By: david roberts

January 17, 2010 05:29 PM Forum: Beginning Astronomy?

Need help with eyepiece height

Posted By david roberts
Considering a dobsonian such as an Obsession or similar construction, what MAXIMUM size mirror (aperture?) would permit comfortable viewing at zenith for a person 6'3" tall, with both feet firmly on the ground. Thanks

August 24, 2005 02:36 AM Forum: Pictures of Me and My Telescope and........

Baby has a new Home on the George 36"RC

Posted By david roberts
Are you referring to the George Observatory in Fort Bend County, Texas? I believe they have a 36 inch newtonian donated some time ago by a Louisiana university.

October 24, 2005 02:36 AM Forum: Reflectors

Fan Questions

Posted By david roberts
Goggle is great. The web is better. Checkout this site, if you haven't already:

http://www.fpi-protostar.com/bgreer/miscpages/fanselect.htm

December 4, 2005 02:39 AM Forum: Beginning Astronomy?

Got the okay to purchase! Now...

Posted By david roberts
2 inches will make a big difference, and the lug factor 6 inch verses 8 inch is minimal. you'll learn to collimate in no time. 1 1/4 eyepieces are just fine. just my opinion, but you will be happier with the 8 inch.

March 9, 2006 01:45 AM Forum: Beginning Astronomy?

Filters

Posted By david roberts
OIII, hands down.

March 9, 2006 04:17 AM Forum: Deep Sky Observing

Help Me Choose!

Posted By david roberts
Well, now I'm really jealous wink . Bring your sunglasses for when you point that big boy in those dark skies. BB is my most favorite place. I've spent months roaming around there doing field geology for academia. On a clear night, the starshine will cast your shadow, guaranteed! You will lose yourself in the constallations. Unbelieveable seeing.

April 29, 2006 05:10 AM Forum: Beginning Astronomy?

What is the best book for beginners

Posted By david roberts
If you want to know where to point your telescope, try:

Sky Atlas 2000.0, 2nd Edition
by Wil Tirion and Roger W. Sinnott
2nd Edition, 1999 retail $60. You can't go wrong.

FIELD GUIDE TO THE NIGHT SKY
By Mark R. Chartrand (National Audubon Society) is a great book.

Most everything else can be found on the internet. Just start Googling. One good site besides A-Mart is http://www.cloudynights.com/

Another good site is

http://www.seds.org/messier/xtra/ngc/ngcindex.html

SEDs actually has several web pages. The one above is just a taste.

Save your money for eyepieces, filters, coffee and gasoline to travel to those dark sites.

Good Luck!

April 30, 2006 02:09 AM Forum: Beginning Astronomy?

To Dob Or Not To Dob

Posted By david roberts
I see no downside to an 8" dob, the workhorse of the amatuer astronomy demographic. You're gonna love it!

May 1, 2006 02:50 AM Forum: Beginning Astronomy?

A silly question (unless I guess wrong)

Posted By david roberts
I could be reading your inference wrong, but it sounds like you mean leave it out every night and day, i.e. 24/7. If this is the case, I would advise against it. No scope is made to take the abuse 24/7. Other wise follow the instructions from above emails.

May 4, 2006 03:46 AM Forum: Deep Sky Observing

H-beta objects in the summer sky?

Posted By david roberts
http://www.cloudynights.com/item.php?item_id=387

here is the article that Dan may be referring to: At long last, I just bought an OIII and bookmarked this article to help my decision.

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