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6 Cards in this Set
- Front
- Back
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With movement |
Minus lens |
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Against motion |
Plus lens |
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Properties of a minus lens |
Thicker on the edges, images apear smaller, |
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A first time bifocal wearer is a draftsman, what type of bifocal would you recommend |
Executive or flat-top 45 |
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If you center the target in the reticle while looking through the near portion of a bifocal lens, you have located the... |
Resultant optical center |
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Glass lenses for standard use must withstand... |
A 5/8" steel ball dropped from a height of 50" |
