by Donald E. Pensack
With illustrations/pictures courtesy of Jim Fly and Jason Khadder
“If I have seen further it is by standing on the shoulders of giants.” Isaac Newton
The telescope most likely to need collimation is the Newtonian reflector (which includes Dobsonians) because it is most likely to have its mirrors knocked out of alignment by handling, [...]
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SUMMER DAYS SALE
FREE SHIPPING ON VIRTUALLY EVERYTHING!
WHAT’S ON SALE?
Telescopes, Binoculars, Microscopes, Spotting Scopes, Riflescopes, CCD Cameras, Tripods, Mounts, Eyepieces, Filters, and associated accessories.
WHEN IS THE SALE?
2-Days Only: Saturday, May 14th through Sunday, May 15th, 2011.
WHAT IS THE FREE SHIPPING?
Free shipping on everything for the 48 states in the contiguous US.
IMPORTANT DATES
SFAA GENERAL MEETINGS & LECTURES
Randall Museum, 199 Museum Way (Near 14th Street and Roosevelt)
Third Wednesday of each month: 7:00 p.m. Doors open. 7:30 p.m. Announcements. 8:00 p.m. Speaker
SFAA BOARD MEETINGS IMMEDIATELY PRECEDE GENERAL MEETINGS AND BEGIN AT 6:00 P.M.
SFAA Long-time member and most generous supporter – Sam Sweiss, Scope City San Francisco, CA
February 16
March [...]
Less of Our Light for More Star Light
Join the 6th worldwide GLOBE at Night 2011 campaign: Feb. 21 – March 6
What: The Globe at Night Campaign
When: 8pm to 10pm local time, February 21 – March 6, 2011
Where: Everywhere
Who: Everyone
How: See http://www.globeatnight.org
GLOBE at Night encourages citizen-scientists worldwide to record the brightness of the night sky. During 2 winter/spring weeks of moonless evenings, [...]
HAPPY HOLIDAYS!
Great Gifts for Family, Friends, and Yourself. Enjoy!
Telescopes
Binoculars
Spotting Scopes
Rifle Scopes
Night Vision
Microscopes
Just a Few Hot Deals at ScopeCity.com
Nature Eye Table-Top Telescope
Price $49.95
-Take it Anywhere
-Designed for Table Top Use
-Perfect for Small Children
Barska Blackhawk 9×63
MSRP $160.00 Sale $55
-Rubber Armored and Durable
-Excellent Light Gathering Performance
-Lifetime Warranty
Fujinon Air Drop 8×23
MSRP $230.00 Sale $79
-”the toughest [...]
