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Old 02-08-2020, 09:25 AM
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astro744 is offline
Join Date: Apr 2007
Posts: 870
Tele Vue has a lot of information about the virtues of each eyepiece design on their website. Click on background tab for each eyepiece type.

E.g. For Delos,

Eyepiece specifications at;

Scroll down for discontinued models.
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