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Common Lens Formulas | optics | Photonics Handbook | Photonics Marketplace
Show that the angular magnification of a simple magnifier glass of focal length f is approx M = 25/f when compared to an unaided viewing distance of 25 cm. | Homework.Study.com
Simple Formulas for the Telescope Owner - Sky & Telescope - Sky & Telescope
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Practical ways to find the principal focal length magnifying
lenses - Is it possible to calculate image distance by knowing magnification and focal length? - Physics Stack Exchange
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Amazon.com: 20 Pack Magnifying Glasses, 3X Magnification, 5.75" Focal Length - Great for Classrooms - Eisco Labs : Health & Household
Magnification in terms of focal length - YouTube
