is there an equipment database out there.

I've been looking at Jared Polin's MyGearVault. I like the database, but I have a question. Is there a database out there that has the info for "all" equipment out there. i.e. I'd like a database that if I put in say Sigma 85 1.4 it pops up filter size and everything.

This is my go-to place for anything lens related: http://www.the-digital-picture.com …O-12233-Sample-Crops.aspx

Selecting a lens from the long list of tested ones will show you image quality tests of that particular lens and to the right you will find links to lens specifications as well as other information.

Along the same lines as above, i just go to his specs page:
http://www.the-digital-picture.com …/Lens-Specifications.aspx