100 ft.
 
Stand nose close to your bathroom mirror. Focus your eye on the speck of toothpaste you spit on it this morning. Then focus on the fly spot on the wall behind you (through the mirror). See the difference?
 
Pentax made a right angle extension for telephotos. A mirror in the extension allowed dirty old men to photograph nearly naked young beauties at the beach without being obvious. The mirror in the device was only centimeters away from the lens. The voyeur does not focus on the mirror! The lens can't focus this close! The lens is focused the total bent path to the lovelies.
 
Regards,
Bob...
----- Original Message -----
Sent: Wednesday, May 16, 2001 1:37 PM
Subject: [not as much OT] Re: Drug Dealer Lens?

This was sort of a random question i came to. What would the image quality be
if Glenn set up a mirror opposite his window, and then took the photos facing
backwards to the goings-on....less conspicuous IMO. This would probably
necessitate a tripod though. This question brings me to a question i have had
for a while. If Glenn's mirror is say 20ft away, and the drug deal is say
80ft from the mirror, would he focus at 20ft for the mirror, or 100ft for the
distance of the image from the camera? I guess i could expiriment
myself...and i think i will.

By the way Glenn, you could always sign up for the witness protection program
 

Brent

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