Chuck Norcutt wrote:
> The sensor has nothing to do with DOF except insofar as the size of the
> sensor factors into final image magnification. Also "crispness" and
> "sharpness" are really different things from DOF. But ignore all that
> for a moment because I'm getting ahead of the story.
>
> <Snip A short lens and DOF lesson>
>
I think this is a very good start to a lesson on DOF, relatively brief
and accessible.
Now all you need to do is add bits to cover how the cone gets smaller,
giving better DOF, when going to a shorter focal length because the
f-stop is a relative measure, so the actual aperture opening gets smaller.
And then a bit more on how different film/sensor sizes interact with
FOV, fl and magnification necessary for equal subject size and you've
done it. ;-)
Moose
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