I'm quite new to photography, and i own a 50mm f1.8 lens, the nifty fifty. For a holiday trip, i wish to be able to take photos of my friends (group shots) and I find the canon 50mm f1.8 to be "zoomed" on my 600D. Should I get a wide-angle adapter for my lens(like the one on photojojo) or the 40mm f2.8, or any other walk around lenses that you can recommend? I'm looking for a small and portable lens. I'm on a tight budget and not really willing to spend much considering I have a zoom lens(from the kit lens) which is quite bulky for my travel.