Hi, I am an ameuter and I plan to buy a SONY A57 camera(APS-C, hence 1.6x crop) and wonder what else I should get to go with the 18-55mm f/3.5-5.6 kit lens. Candidates include Sony 35mm f/1.8 SAM DT, 50mm f/1.8 SAM DT, and the 85mm f/2.8 SAM, but other suggestions are certainly welcomed.
Previously I had a NEX5 camera (same sensor) and mostly used the 18-55mm kit lens. I primarily do natural photography during field trips and also everyday shooting that may involve portraits at parties and 'walkabout' street scenes. My experience shows that the ubiquitous kit zoom is good enough for general purpose work, but even for me it is often painfully obvious when the lens is just too slow or, at 18mm, has way too much barrel distortion.
Hence I think there is a need for a fast, affordable (<$400), and high quality prime lens that preferably covers both 'expansive vista' and 'everyday' needs. If impossible, perhaps one that can do either pretty well. I'll appreciate it if some simple explanation can also be given about how choice of focal length comes into play here. Thanks.