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Low Mag / High Mag
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12-09-2017, 01:52 PM
FlashDrive
(Poppy)
Senior Citizen
Join Date: Apr 2008
Location: Bribie Island
Posts: 5,059
Let's put it another way ....
Let's say I have a F/5 Achro' with a 100mm Lens .... I have an eyepiece giving me say 20x .... what is the ' formula ' for finding the f/l of the eyepiece.
Col.....
FlashDrive
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