This is the set that I have:
<http://www.bhphotovideo.com/bnh/controller/home?
O=productlist&A=details&Q=&sku=41073&is=REG&addedTroughType=search>
or
http://tinyurl.com/e3wdt
There are no electronic contacts to transmit aperture information to
the body, the mechanical aperture coupling is there for cameras that
use it. Neither is there any AF drive pass-through, so "Quick Focus"
wouldn't apply.
All lenses operate as manual focus, M series or K-mount lenses with
auto-iris operation. With the DS, this requires Manual exposure mode.
Godfrey
On Jan 24, 2006, at 3:12 PM, Jack Davis wrote:
Godfrey,
Can you (or someone) tell me if the "B" tubes allow A-auto program
operation? If not, which tube set?
Not that I intend to use Program setting, but the meter/shutter
require
an "A" capability lens in order to allow "Quick Focus" operation with
the MZ-S.
Thanks!
Jack
--- Godfrey DiGiorgi <[EMAIL PROTECTED]> wrote:
I bought a set of Pentax Automatic K mount tubes from a vendor on
Ebay last year. NOS ... in box with case and all papers they were $65
or so. Automatic means that they operate the auto-diaphragm
mechanism ... no electronic connection so all lenses operate as
manual K-mount lenses do.
Godfrey
On Jan 24, 2006, at 9:58 AM, [EMAIL PROTECTED] wrote:
Anyone got some K-mount extension tubes for sale? Cheap?
Uncoupled is fine.
I've got an experiment in mind.
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