A quick question that I haven't been able to find an answer to... I don't have lens hoods for either lens but I do like lens hoods. From the B&H descriptions, it appears that the 12mm hood is a screw-in while the 45 is a clamp-on. Can the lens caps be placed on the lenses with the hoods mounted? Thanks Oh...and 89 bucks for a lens hood (12mm)? WTF's up with that? If there are less expensive alternatives that folks are pleased with, I'd be interested in any info.