The focus lies along which line?

Started Mar 24, 2013 | Discussions thread
Guidenet Forum Pro • Posts: 15,748
Plane of focus

Note the plane of focus may not extend as wide as your blue line may suggest. At some point the difference in distances become too great and the plane of focus no longer remains very flat. It's also why very wide lenses can become more and more expensive as they get wider.

I agree with you that it seems to be a miracle of optics that this is accomplished at all. Pretty cool.

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Cheers, Craig
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