Re: [Leica] mxsmanic and pinholes

["Mxsmanic" <mxsmanic@hotmail.com>]

Malcolm writes:

> I know that it is a relatively minor disadvantage,
> but aren't pinholes just a little bit restricted
> by their inability to focus rays of light?

No.  Everything seen through a pinhole is always in focus, no matter where the
image plane resides, and no matter what it's shape or orientation.  In fact,
with a curved film plane, you can eliminate fall-off on the edges of the frame.
By moving the film plane in other ways, you can change perspective.  None of
this requires any change in the pinhole, which provides a focused image under
all conditions.

I have read that pinholes do exhibit some chromatic aberration, but I haven't
found out the mechanism of that thus far.