Either using eyepiece projection and or by using a web cam and or a ccd camera.
http://www.stargazing.net/Astroman/Craters.html
http://www.astronomics.com/main/product.asp/catalog_name/astronomics/category_name/K49JT7XW30VE8G6FWFPL4A3C54/product_id/1321
http://www.astro.shoregalaxy.com/webcam_astro.htm
http://www.meade.com/dsi/
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