Category:Monocentric eyepieces

Media in category "Monocentric eyepieces"

The following 2 files are in this category, out of 2 total.

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  Monocentric 1880.png 450 × 200; 19 KB
  
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  Steinheil Monocentric 1880 Eyepiece Konkoly Thege 1890.jpg 800 × 1,003; 423 KB