<p>Just a little background: I started shooting concerts recently and currently use the Nikon D600 with a Nikkor 70-200 V1 lens. I'm struggling to get sharp pictures. I've tried out a lot of things, and sometimes I get lucky, but my keeper ratio is pretty bad. In general, I start out in manual mode with ISO 5000, shutter speed 1/500 and aperture 4.5, I find that this gives me pretty decent results, but I sometimes have to lower the ISO to about 2000 because there is usually light shining on the artist's face and the picture gets whitewashed at 5000. Anyway, ultimately, I find that I have to press the auto-focus button multiple times to get the focus right. I thought it could be the capabilities of the 600 camera, so I tried out the D810 and I had similar problems. The D810 has a lot of pixels, and some photographers told me it wasn't the best choice for concerts, and after testing it out, I sort of agree. There are two things I'm considering now. Change to a Canon 5d Mark 3 (as it seems to be the 810 equivalent (sort of, at least) but with less pixels, a good combination for concerts), or try out the V2 version of the 70-200 lens, which I hear has better auto-focus. I could end up spending a lot of money renting out these things, so I thought I'd check here before I start trying out things.<br> Now, another photographer told me that the 5D (and canon cameras in general) give better colors, but less shaprness than their Nikon counterparts. In his example, he said that with the Nikon cameras, you can spot even the wrinkles of people's faces, but with Canon, the colors are bettter and the sharpness not up to par. So, Nikon is good for landscapes wheraas Canon is good for weddings, according to him. Is this somewhat true? I definitely don't want to compromise on sharpness for my concert photorgaphy.<br> So, any advice on both my questions (if my move from the Nikon D600 to Canon 5d Mark 3 would help with my sharpness and auto-focus, and if Canon cameras are less sharp than Nikon) would be very much appreciated!</p> <p> </p>