![]() ![]() ![]() This can change the mm rating of a single eyepiece two or three times. ![]() The piece is used to increase the magnification of the instrument's optics by x2 or x3. ![]() What does a Barlow lens do when it is used?Ī Barlow lens is an accessory that is placed between the objective lens or mirror and the optical piece that you look through.
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