... Optical: Celestron 0.67x focal reducer, Celestron C14 optical tube. 3910mm focal length, 365mm aperture. ... Schmidt-Cassegrain telescope operating at f/11 with a 0.67 focal reducer to f/7.4. P.S. А кто чем с fits'ами обычно работает? ...
... optically above or at the same level of the TAL2K. U.S. customers will also find it a more price effective solution than the TAL2K. As far as planetary performance goes a MCT or a MN in the 6" range offer a far better solution in all aspects (mechanical ...
... of the average amateur's Dobsonian telescope seems to be settling down into a ... Or does anyone see further optical improvements on the horizon that don't involve ...
... The apparent optical brightness, corrected to a standard distance from the sun and ... By taking thermal data as well as optical, it is possible to disentangle the albedo ...
... How does it perform optically? I find very high contrast in DSO's like the Trifid, Swan and Eagle. ... Near M11 there were some mentioned in a Sky and Telescope article and it seemed to work fine on them. ...
... There were 20" and 24" Dobs (not of the best optical . quality) that really didn't show more detail, although the image . ... Полистайте 'Sky & Telescope' за 70-80-е годы. Два слова о центральном экранировании. ...