[OM] Re: Mind Bender

[Stephen Troy]

>From: AG Schnozz <agschnozz@xxxxxxxxx>
>Subject: [OM] Mind Bender
>
>Quiz:
>
>What focal length is effectively half-way between 100mm and
>200mm?
>
>AG-Schnozz


Here's how I see it:

100mm = 24 degree angle of view
135mm = 18 degree (halfway)
200mm = 12 degree

Steve Troy



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