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metalgibson

14 Iun 2016 11:48



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 Eu nu am vazut oglnzi mari in stadiu final sferice .  .

Mari, la tine asta ce diametru? 

iata va dau un link cu oglinda sferica cu diametrul de 200mm :

http://www.aliexpress.com/item/Newtonian-reflecting-telescope-D203-F800-D203F800-203800-reflection-Objective-lens-Secondary-mirror/32651882904.html?spm=2114.10010108.1000013.2.SNxK7g&scm=1007.13339.33133.0&pvid=497971eb-af88-4526-a03e-cb5c51b8e664&tpp=0

una de 150mm :

http://www.aliexpress.com/item/Newtonian-reflecting-telescope-D150-F750-D150F750-reflection-Objective-lens-Secondary-mirror/32621181033.html?spm=2114.01010208.3.151.K66WkT&ws_ab_test=searchweb201556_10,searchweb201602_5_10017_507_401,searchweb201603_3&btsid=5f726c3d-f67d-4ef2-8243-92b1f827f83c

una de 114mm :

http://www.aliexpress.com/item/Newtonian-reflector-telescope-114900-reflection-of-the-objective-lens-group-with-secondary-mirror-D114F900/32634630593.html?spm=2114.01010208.3.168.yl1LoT&ws_ab_test=searchweb201556_10,searchweb201602_5_10017_507_401,searchweb201603_3&btsid=5f726c3d-f67d-4ef2-8243-92b1f827f83c


eu am telescop cu oglinda sferica 114mm ,,nu am observat nici odata deformari la stele sau luna sau nebuloase,galatii,roiuri stelare spre marginea oglindei ,poate din cauza focalei oglindei care e de  450mm plus barlow la focuser unde la F final - 1000mm... nu stiu cum sta treaba la cele sferice cu D 150 - D200