i know all these already. but still appreciate the feedback.
just that since the difference is been mentioned.
comparing a 17-50 f2.8 and a 50mm F1.8 (adjusted to 2.8), both at 50, yes I agreed that 50mm prime will be sharper, but what other differences.. but this is ok, not the topest priority to me as of now.
All right, in simplest term...
Your 17-50mm @ f2.8 will lose in terms of the bokeh effect & sharpest in comparison to a 50mm prime @ f2.8... Also, the 17-50mm lens because of lens constructions, at 50mm on the 17-50mm, the lens will have more or less some distortions. The 50mm prime will have only minimal distortion due to its fixed focal construction.
In another words, a prime is better performances, but its all up to personal prefences.
http://www.the-digital-picture.com/Canon-Lenses/Zoom-Vs-Prime-Lens.aspx
http://www.photozone.de/canon-eos/2...pherical-if-canon-test-report--review?start=1
http://www.photozone.de/canon-eos/160-canon-ef-50mm-f18-ii-test-report--review?start=1