Steve Scott opined:
>I've seen quite a few primes advertised as zooms - undoubtedly the focusing
helicoid confuses these "owners".
Steve S.<
I cringe whenever I read or hear any long lens, zoom or prime, call
"telescopic" insead of "telephoto". Although some semantic analysis reveals
that telescopic (= distant vision) is more apt than telephoto (= distant
light) I am happy to follow common usage which sensibly puts the word
"photo" into the name of the photographic device. Telephoto in the context
of lenses originally meant a lens whose focal length had been made longer
(tele) than its physical length by the addition of a negative rear group of
elements to the image forming front group of elements (an internal
teleconverter).
Besides, a common usage meaning of "telescopic" is collapsible (like a
refracting telescope whose tubular sections slide over and into each other).
By this definition some standard collapsible lenses for Leicas could be
called telescopic!
Bullsh*t Baffles Brains ;-)
Regards,
Anthony Farr
-
This message is from the Pentax-Discuss Mail List. To unsubscribe,
go to http://www.pdml.net and follow the directions. Don't forget to
visit the Pentax Users' Gallery at http://pug.komkon.org .
