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What is the difference between a 2″ eyepiece and a 1¼" eyepiece?The only limit to field-stop size is the inside diameter of the eyepiece's barrel. So, for example, a 20mm 2″ eyepiece will show more sky than a 20mm 1¼” eyepiece through the same telescope.
The only limit to field-stop size is the inside diameter of the eyepiece’s barrel. So, for example, a 20mm 2″ eyepiece will show more sky than a 20mm 1¼” eyepiece through the same telescope.
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