From: John Francis
On Wed, Mar 14, 2012 at 04:03:45PM -0400, Daniel J. Matyola wrote:
Does anyone have any experience with, or opinions on, the following lens?
smc PENTAX-DA 1:3.5-5.6 18-135mm ED AL [IF] DC WR
And just what do all those letters at the end mean?
ED - Extra Dispersion Some elements made of high-refractive-index glass
AL - Aspherical eLements Some of those pieces of glass have shapes
that are somewhat harder to manufacture.
IF - Internal Focus The front element doesn't rotate when focussing
(which is very handy if you're using a polariser)
DC - ?? Don't Care? Destroys Cameras?
WR - Water Resistant
DC = Direct Current motor
... and I believe ED stands for Extra *low* Dispersion glass
--
PDML Pentax-Discuss Mail List
[email protected]
http://pdml.net/mailman/listinfo/pdml_pdml.net
to UNSUBSCRIBE from the PDML, please visit the link directly above and follow
the directions.
