> I think technically they should be refocused (anyone, please correct me if
> I'm wrong).....but in practical terms my experience is, they needn't be. Try
> simply setting it to it's designed focal length and shooting....IMHO little
> out of focus softness is often a plus.
>
> Mike
>
>
> In a message dated 10/28/01 5:02:21 PM, [email protected] writes:
>
> << Once you have the zone plate focused for one object, will it be focused for
> any other objects closer or further away, or do I need to refocus according
> to the distance of my subject?
> dwight >>
A zone plate focusses like a lens so you should adjust the focus for
objects at different distances. On the other hand, they tend to have
large f numbers (like f/32) so they have large depth of field. They are
also hard to focus because they are so dim.
