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Teo

06 Feb 2013 03:44



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Doua articole/discutii despre refractoare :

http://www.astronomics.com/why-buy-a-refractor-telescope_t.aspx

si aici :

http://www.astronomyforum.net/astronomy-beginners-forum/99029-4-refractor-vs-6-newtonian-contrast-sharpness.html

