I'm looking at expanding my lens collection to add some form of wide angle lens and a decent portrait that I can use in low light.
My problem is that I'm unsure of what other types of lens brands out there can fit Nikon mounts and Panasonic/Olympus M43 mounts. I have a Nikon lens adapter for my Panasonic, and I'm looking into adapting other brand lenses (Pentax, Canon etc) if the price is right. What other brands are out there for these mounts?
I'm right now looking for a good wide angle lens for my Panasonic that won't cost me anything more than $250. That's all my current "pocket money" can spare, and I can atleast shoot wides and portraits with my two lenses (I already have a 28-80mm Nikon lens now).
I'm also looking at a nice 50mm portrait lens that I can shoot head and shoulders shots indoors, as it may be needed for my work. I know these can be had from anywhere close to $100 right up to $400 or more. This one isn't so important, the wide angle is.
Would I be best getting one of the kit lenses for a Pentax camera (14-42) or Canon (18-55) and using the wide end on that? I only really plan on shooting outdoors with it.