Canon Shooters: Good Low-Light 50mm Lens for Cheap with Coupon

Sorry for the rush of Canon-specific deals lately, but it just doesn’t seem like there are as many good savings out there for users of other systems at the moment.
We talked a while back about 50mm 1.8 lenses as being one of the first upgrades an SLR shooter should get.  Optics at 50mm aren’t too [...]