Hi, all.
I also own this lens. As usual on Sigma lenses, it seems optically
fine, but rather poor mechanically. It's quite sensitive to flare,
though.
I find it very useful on the EOS-300D because of the x1.6 crop factor
-- it works nearly like a 21mm lens!
>lens cap is two pieces. A round cap slides over the outside of the lens and
>has an opening that allows a standard type of lens cap to snap on.
>If you leave
>the outer part of the cap on and remove the snap in section, a circular
image is made on the film.
Yes, and with the x1.6 DSLR factor, there's no noticeable vignetting!
I usually leave the outer part of the cap on, it helps a bit with
flare.
Enjoy,
--
Carlos J. Santisteban
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