Re: Experiments with pinhole diameter

----- Original Message -----
From: "Fox, Robert" <RFox@aarp.org>
To: <pinhole-discussion@pinhole.com>
Sent: Monday, November 18, 2002 4:47 AM
Subject: Re: [pinhole-discussion] Experiments with pinhole diameter

> I would assume that, like "traditional" photography with a lens, as
exposure
> time increases sharpness decreases, all factors being equal.

With a lens, sharpness does not decrease as exposure time increases. Unless
you are referring to the loss of sharpness from subject movement or loss of
resolution on the film from overexposure...

>So using a
> smaller hole than the optimal may lead to decreased sharpness, but on the
> other hand, the decrease in sharpness may not be visible anyway.

Smaller holes do (not may) lead to decreased sharpness because of
diffraction, and yes it is visible depending on the enlargement.

John
Received on Mon Nov 18 09:38:03 2002