| As I understand it the EF-S 60mm USM is a fixed focal length macro lens that is the equivalent of a 96mm lens used with film. A standard EF 50mm lens might be an alternative as that comes out as an 80mm equivalent. The 10-22mm wide angle is a zoom equivalent to a 16-35mm lens used with film. The CCD sensor multiplys the lens focal length by 1.6 with these cameras. I believe that this is a common trait with DSLRs. I think I will have to go with the recommended lenses for this reason. Fortunately the mutiplying factor will work in my favour when it comes to long distance zoom photography so I could use an older EF lens to my advantage.
Unfortunately my old Pentax isn't compatible with anything these days so that is on Ebay and should pay for a battery for the Canon! I am thinking about next February or March for buying a housing so availability shouldn't be a problem. If Cameras Underwater have it on offer before then I might be tempted though.
Jim |