Anyone used both of these lenses, and can compare the advantages / disadvantages of both? I own the Sigma 60mm, originally bought as 1) it's half the price of the Olympus and 2) the longer focal length means it can be used as a short telephoto. However, after a year of use I'm becoming increasing frustrated with it. Can't use it indoors due to the long focal length, full body shots have to taken a ridiculous distance away, and as a nature telephoto lens it's not really long enough. It's also relatively big and heavy for a m43 lens. On the plus side, it's the sharpest lens I own, great rendering and bokeh, it really is a poor-man's Olympus 75mm. Some of my best photos have been taken with this cheap lens, which means I'm very reluctant to sell it. Will the Olympus 45mm be a worthwhile upgrade? Really I want to take more of my baby indoors, but I'm torn as to whether it's worth spending all that extra money on.