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Only 1/2 the field is illuminated - Science & Laboratory

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If you have a rotating perforated diaphragm, that means the hole you want to use is blocking the light partially. Make sure your diaphragm is set correctly.

Also, you might want to check that your objective is set and aligned, that could also cause half the field being dark.

Posted on Jan 30, 2009

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1 Answer

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