Last chance to pick out the lenses in the Smurfathon. Take a chance, spin the wheel. The candidates are the Olly 45mm, the Vivitar 55mm and the Rokkor 50mm. Easy as pie!
Although more than 100 people have viewed the Smurf trifecta, no one has hazarded a guess as to which lens is which. This could be because A. It is soooooo obvious! DOH! B. None of the above. List the lenses 1,2,3 and win an autographed CD. Or even not autographed so you can sell it on eBay! One CD available. Maybe two if @lpowell votes.
I couldn't tell the difference. If you have a flat image you can look in the corners, but for shallow DOF there is no detail in corners. On a really big screen I can see there are subtle differences, but I can't tell which is which.