Category:Ramsden eyepieces
Media in category "Ramsden eyepieces"
The following 2 files are in this category, out of 2 total.
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Ramsden 1783.png 450 × 200; 10 KB
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Ramsden-Okular.jpg 320 × 158; 36 KB
The following 2 files are in this category, out of 2 total.