So I have the E-M10 body and the following lenses: P14 2.5 O12-50 O14-42 II R O40-150 R I know that the 14-42 is smaller and I would assume lighter than the 12-50 - but I'm not using M43 because it is lighter than a FF/APS-C DSLR, it's because I'm new to the whole ILC concept. So in the absence of the weight/size issue, is there a reason I should have both lenses? The reason I would sell the 14-42 (I know, I'd be lucky to get $50 for it) is to free up room / get rid of a redundancy. This would allow me to get an O45. Standard (for now) disclaimer: as I mentioned, I'm new to this. So I don't know what my "style" is, or whatever. I like taking landscape/nature/travel mainly, but I'm looking to move into astrophotography, portrait, and macro eventually.