Sigma 300mm F2.8 APO EX DG HSM

Announced Feb 14, 2005 •
Telephoto prime lens | Canon EF, Nikon F (FX), Pentax KAF, Sigma SA Bayonet, Sony/Minolta Alpha | 195
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I had the opportunity to buy a used Sigma 300mm 2.8 APO EX DG HSM lens. Optics were fine, rendered sharp images. Everything was fine for a week, then I noticed that while under Autofocus-C on my Nkion D700 body (whether using the AF-On or shutter button), after about 4-5 seconds of continuous autofocusing, the lens would stop focusing and lock the aperture down to f32 for as long as the in-viewfinder display is illuminated (mine is set for 4 seconds). After the display turns off, I can press...
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This is a rare lens, but may as well give it a shot... I got a second-hand Sigma 300mm f/2.8 prime. It is the EX DG HSM APO version. Looks to be of relatively recent vintage, since it does not have the crusty old crinkle finish. For fellow owners of this lens, old and new versions alike, does the stock lens hood have some play when affixed in the shooting position? The hood on my copy can wiggle a bit. I ask because I once used an older variant of this lens (non DG) and do not recall the...
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Ahoy! Does anyone have a PDF version of this user manual or know of a URL where I can download it?  I can't find it on the Sigma (UK), USA or Japanese websites even though it's a current model :-( I've emailed Sigma (UK), but am awaiting their reply.  Any help appreciated. --Mark (aka Pirate!)
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