What Makes Telephoto Lenses Have a Longer Focal Length Than Convex Lenses?

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SUMMARY

A telephoto lens is designed to have a longer focal length compared to a single convex lens due to its unique optical construction, which includes multiple lens elements that compress the light path. This design allows for greater magnification and a narrower field of view, making telephoto lenses ideal for capturing distant subjects. The combination of these elements results in a focal length that significantly exceeds that of standard convex lenses, enabling photographers to achieve high-quality images from afar.

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Why is a telephoto lens considered to have a longer focal length than that of single convex lens?
 
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copitlory8 said:
Why is a telephoto lens considered to have a longer focal length than that of single convex lens?

The first few sentences http://en.wikipedia.org/wiki/Telephoto_lens" seem to cover that off nicely.
 
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