Transcript Document 7728671
Astronomical Accessories
To illuminate
Cartes du Ciel
Cloudy Nights – Andrew Johnson
The ways of collimation
Finders
Power in the field
Light Pollution Filters
Color filters
Fringing Filters Absorb much of blue or violet fringing seen in achromatic refractors.
Best used on small, well corrected refractors
Konigs – GRO & University
Avoidable oculars 2” Kellners in short f. ratios Zooms
Barlow lenses
Optical Clean-up
Stay Away
Star Charts (Free or shareware) SkyGlobe (download from search engine) Cartes du Ciel (download from search engine) Cloudy Nights – Andrew Johnson http://www.cloudynights.com/item.php?item_id=1052
Equipment Vendors Anacortes Telescope – www.buytelescopes.com
Astromart classified – www.astromart.com
Gary Russell Optics http://www.citlink.net/~optics/products.html
Hands on Optics – www.handsonoptics.com
Oceanside Photo & Telescope www.optcorp.com
Orion Telescope – www.telescope.com
Sirius Optics http://www.siriusoptics.com/