The field of view of MFT prime lenses

Started Dec 9, 2011 | Discussions thread
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sacundim Senior Member • Posts: 1,111
So why do they quote diagonals for telephoto lenses?

Guy Parsons wrote:

The angle of view is always quoted as the diagonal angle of view, just like your TV set may be 40 inches diagonal. The numbers are bigger, that's why.

If your hypothesis was true, we would expect lens makers to quote the short side view angle for telephoto lenses, yet they quote diagonals for those too.

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