Re: [OM] Sunny 16?OT re. loony f/4

[Hugh Turnbull]

Half the dimensions (width and height) is a quarter the light. A half moon is
only half the dimension in one direction, so half the light.

Terry and Tracey wrote:

> > I would guess that since half a moon gives you half the light, then you'd
> > need to open up one stop.
> >
>
> Wouldn't half moon give 1/4 of the light?
>
> Foxy
>
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