200 likes | 368 Views
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.
E N D
Fringing Filters • Absorb much of blue or violet fringing seen in achromatic refractors. • Best used on small, well-corrected refractors
Avoidable oculars • 2” Kellners in short f. ratios • Zooms
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/