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Tutorial 9 - Axial Color

Wikipedia entry on crown glass

Vitreosity site showing how crown or plate glass is made



1.What is the axial color (focus shift) in F - C light, for a N-BK7 singlet of 29.56 mm focal length?  
2.What is the axial color (focus shift) in F - C light, for a N-SF6 singlet of -68.47 mm focal length?

Discuss, and view comments on YouTube.

Solutions to the homework can be found here.
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