--- John Whittingham <[EMAIL PROTECTED]> wrote:
> Are they AF extension tubes by any chance, just curious.
 
No, they're Pentax' Pentax Auto Extension Tube Set B (12, 19 &
26mm): I believe they connect the lens' electronics to the body
for metering and diaphragm function but do not drive the AF. 

I haven't gotten them yet, they're due to arrive today/tomorrow.
The price was right and I use them infrequntly enough that even
if I have to stop the lens down manually and work with Av or
Manual exposure modes only, they'll be fine for my purposes. ;-)

Godfrey



                
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