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http://allarscopes.com/telescopes/488mm_f5/index2_eng.htm http://allarscopes.com/telescopes/488mm_f5/index2_eng.htm This is a hardcore version. It is interesti

http://allarscopes.com/telescopes/488mm_f5/index2_eng.htm http://allarscopes.com/telescopes/488mm_f5/index2_eng.htm This is a hardcore version. It is interesting that such extremely low technology methods have so precise results.

Renaud 13y ago
What an impressive amount of work! Absolutely beautiful though.