I'm looking for a replacement hood for my 18-50 f/2.8 EX DC HSM Macro, but I'm not having much success. I've instead found some hoods for the 17-50 OS (stabilized) version, which also has a 72 mm front element and compatible focal lengths.
As this hood snaps to the outer rim of the front element (with a similar mechanism), I'm wondering if it would be compatible with my lens. Does anybody know the degree of standardization?
UPDATE: I've been replied by a Sigma distributor, saying that the appropriate replacement is LH780-04. This does not say anything about the compatibility of LH-825-03 though.