Originally posted by quebec J e suis propriétaire d un K20 d depuis 2 ans et je cherche une lentille sigma 800 mm avez vous des contacts à me donner ??
If you have some $6,599.00 to spend here you go
SIGMA | 800mm f5.6 Ultra-Telephoto Lens | for Pentax/Samsung | 152109 | SuperDigitalCity
Or were you after after the unique 300-800mm? Don't know, you didn't specify clearly. Well, anyway, here you go
300-800mm F5.6 EX DG APO HSM - Telephoto Zoom Lenses - SigmaPhoto.com but only if you have approx $10,000.00 (MSRP) to spend.
Do you need a link to buy Pentax 645D? I'd like to help.