I'm looking at getting a wide angle, especially for star and landscape shots.. but budget dictations are being enforced (<$500)
after much reading of the forums and reviews .. I'm leaning towards the Sigma 10-20mm F4-5.6 EX DC (HSM)
However, all this reading has brought my attention to something I hadn't really looked into .. APS-C .. and now I have totally confused myself...
I knew our 60D, was an APS-C format, and never really wondered about it, a lot of pages talk about multiplying the lens by '1.4" to get the "real" length ... ie: my 50mm apparebtly really works out about at 70mm ..
I've searched the forums here for APS-C .. but unless it was way down in the searches, I couldn't find a post that talks more about it, in depth.
What I'd like to know is if I buy an APS-C lens like the sig 10-20 (as an example) - designed for the APS-C sensors - am I getting 10-20mm or is the reality 14-28mm?