On Jan 10, 2010, at 12:24 AM, Sandy Harris wrote:
There are plenty of other differences -- notably price, weight and
focal length -- and I have some idea how to balance those in relation
to my usage and preferences. However, I don't have much idea how
important or useful the SDM motor is, so I am asking here.
Is this something that should be ignored in making a choice? An
important factor? Somewhere between?
My main concern with SDM is the reliability and longevity of the motor.
In my minimal exposure to SDM I was surprised at how silent it is. It
is as if the image comes into focus by magic. I can see that it would
be very useful when you don't want people to notice that you are
taking pictures of them. They won't hear anything until the shutter
clicks. Which I suppose would be another advantage of the K7 over the
K20.
I have heard that an SDM lens can focus faster than a conventional
autofocus lens.
--
Larry Colen [email protected] sent from i4est
--
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.
