Sigma 70-210 f/2.8 lens for $680

PTS

I came across a shop in Golden Arcade, and saw this lens (they called it a lens for film cameras) from Sigma.  The optics is in good condition and I bought it.
I tried it with my Canon 300D and it gave an error 99 at bright objects, but worked Ok when I point it at very dark location (when the camera indicated a f/2.8)
I search the web and find out this is because the old Sigma lenses for EOS has the non-compatible firmware with real EOS.  It simple cannot communicate with the EOS command for closing the aperture.  Apart from this the len is fine.  I surely will not need to close the aperture when shooting the stars!
But now I need to find a lens hood of 82-mm diameter!

PTS

Joeylo1

Hi PT

It is Lo Wing Fan, long time no see, How are you ?

I have bad experience of using Sigma zoom len (up to 70mm) which focus lock was not
functioning and problem not fixed yet.

Lo

PTS

I don't have much experience with Sigma lenses.  I get this because it is so cheap!
By the way, I've made a lens hood out of a plastic beaker (~500 ml size).

PTS