Re: Depth of field preview

[P3D Peter Davis <pd@xxxxxxxxxxxxx>]

> I noticed a camera for sale (not stereo), in a catalog, it said it has a
> depth of field preview.  Does any one know how that works?  Also, would it
> probably be a bad idea to get an slr that has auto focus, considering I will
> always be shooting two shots with it for stereo?

Most SLR's keep the aperture wide open during focussing, metering, etc., and 
just close it when you press the shutter.  This allows you to have maximum 
light in the viewfinder while setting up your shot.  The DoF preview simple 
forces the aperture closed so you can see what's in focus and what's not 
while setting up.  The drawback, of course, is that the image in the 
viewfinder will be much darker.

-pd

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                                    Peter Davis
                             http://world.std.com/~pd/

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