If the "focal distance" is 1/3 inch, you could expect a visible image cone of about 1 inch. The rule of thumb is one and a half focal lengths either side of the axis. ----- Original Message ----- From: "J.E. Patterson" <[email protected]> To: <pinhole-discussion@p at ???????> Sent: Saturday, February 16, 2002 8:41 PM Subject: [pinhole-discussion] new AOL tins; limits on wide-angle pinhole?
> > The ubiquitous AOL trial CDs have begun appearing in a different > packaging in our neighborhood; a metal tin slightly larger than a CD > and about 1/3 inch in height. From this sprang several questions: if > this was made into a pinhole, how "wide angle" of a pinhole would > it be (I can do the calculation if given the formula, I think) and is it > going to cover the whole area of the back? I guess what I mean to > ask is what are the limits of the "image cone"? > > Cheers, > Jane > -- > J.E. Patterson > www.lightjunkie.org | www.luxumbradei.com > > _______________________________________________ > Post to the list as PLAIN TEXT only - no HTML > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??????? > unsubscribe or change your account at > http://www.???????/discussion/ >
