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Image: Nagler 1979 1981
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Description: Nagler type eyepieces.
Title: Nagler 1979 1981
Credit: Own work
Author: Tamasflex
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: https://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes
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