I've been prepping myself to get into the event photography and recently purchased the following items: D600 28-300mm f3.5 VR Nikkor (came with camera) 70-210 f.28 VR Nikkor 24-70mm f.28 VC Tamron 2 SB-910 speedlights 1 flash commander 1 lightsphere With that said, a little background as to why I think I need a prime. I want to start picking up 2nd shooter gigs for weddings and it seems that a lot of professionals have prime lenses because they're relatively cheap and have a low f-stop. I can appreciate that since you often don't know what your lighting situation will be, so the lower the f-stop the better. Another thing to consider is the D600's iso sensitivity, which I think is professionally useable up to 2500, max 3200 without much image quality loss (but that's my opinion, I'm sure some of you think up to 6400 is fine). At first I researched what would be better, a 50mm or an 85mm. Results seemed mixed, some people swear by one or the other. I guess what I want to know is if I'm someone's second shooter and I have the equipment stated above, what prime would be best for me? Would a 105mm be better than a 55mm or 85mm? What would a lead photographer prefer I have? If I were, for example, shooting on the dance floor with minimal light, would a 55mm be best? And for those curious of my shooting ability and experience I welcome you to check out my website at www.dantophotography.com. Thanks in advance!