Hi all, A friend of mine has asked me to do their engagement pictures in the next few weeks. Currently I shoot on a D90 w/ 35 f/1.8 and have a 18-200 vrII. I'd like to rent a lens to ensure I get the sharpest pictures and I'm also not sure what lighting condition i'll be shooting at .. (location tba). I'm considering the 70-200 f/2.8 and/or the 24-70 f/2.8 or maybe even a wide angel 17-55 f/2.8. Is there any one lens you would suggest or would you think the ones I have already should be sufficient ? Thanks!