Hobby Q & A: should I keep my lens caps on or off while my telescope warms up after a really cold night out? . Will anybody believe that I spent a year shooting my analemma composite, rather than a few minutes using Adobe Photoshop?

• Localización: Sky and telescope, ISSN 0037-6604, Vol. 113, Nº. 6, 2007, págs. 88-89
• Idioma: inglés
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