Originally posted by X Man You can buy a new Canon EF 50mm F1.8 AF lens for less than $100 NEW. The least expensive Pentax 50mm AF lens is faster, and probably better but is TWICE as much.
You can buy a NEW Canon EF 85mm f/1.8 USM Autofocus Lens for less than $350!
True, but you picked pretty much the most obvious focal lengths where Canon is cheaper, and you also made it an unfair comparison by comparing Canon's 50/1.8 against Pentax's 50/1.4. If you compared Canon's 50/1.4, you'd find it *more* expensive.
Overall, you'll find some lenses more expensive in Canon than Pentax, and some the other way around. And some lenses Canon provides for which there is no Pentax equivalent, and some where the reverse is true. Overall, it would be a wash, except for one big thing: stabilization. Building a *stabilized* collection in Canon will cost dearly, and of course for many lenses it just isn't available. Also consider that with Pentax it is often possible to build a *very* cheap collection by using old MF lenses.