盼星星盼月亮 终于盼来了新镜子 |
相关帖子器材:HEQ5+BLACKHOLE 200 F3.6+ATIK460+ oag Q5ii
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爱牧夫
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寻找陕西 西安天文爱好者,广交全国各地爱好天文的朋友,多多交流,竭尽所能,共同进步。
http://user.qzone.qq.com/282660603/infocenter AL130APO,CEM60,WFT立柱,QHY9M ,Robo PRO Focus,Baader7nm Ha,QHY5,50200. TV2X ,TV3X ,TV5X, TVPL8mm, TVPL15mm ,Meade 26mm,LXY天顶,EOS 450D |
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器材:HEQ5+BLACKHOLE 200 F3.6+ATIK460+ oag Q5ii
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器材:HEQ5+BLACKHOLE 200 F3.6+ATIK460+ oag Q5ii
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器材:HEQ5+BLACKHOLE 200 F3.6+ATIK460+ oag Q5ii
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BADMAN:目镜的表现视场的简易计算:表现视场=57.5/焦距*视场光阑(度)
举例说明一个焦距20mm的目镜,视场光阑直径是24.5mm,它的表现视场=57.5/20*24.5=70度 |
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器材:HEQ5+BLACKHOLE 200 F3.6+ATIK460+ oag Q5ii
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器材:HEQ5+BLACKHOLE 200 F3.6+ATIK460+ oag Q5ii
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