Re: Pinhole Focus

Ian McKee writes:

> ... stuff snipped ...
> Calumet sells a set of twelve pinholes ranging from .0059" to .032". I
have
> mounted these on a 4" x 5" camera and shot the whole series at an
> arbitrarily selected bellows extension=focal length of 210 mm. With
each
> pinhole I get the same image and the same degree of sharpness.
> ... stuff snipped ...

Give us more details. What was your test subject? Did you use film or
paper negatives? How did you measure the sharpness?

I did a similar experiment with a set of commercial pinholes, on a 35mm
camera
mounted 100 mm from the film. I photographed a resolution chart. My
results were
that I could see the difference between different pinhole sizes.
Received on Sat Dec 14 14:55:13 2002