On the 5D Mark III, you can leave the only lens, that is, do not buy other glasses at all, the image quality is simply amazing, but there are fixes, 24 1.4 II and any of the 70-200 2.8 by 70 without any problems leave the beginner behind. At the moment, the best of all native 24-70. I think it would be fair to rank something like this: 1 place EF 24-70 II 2nd place Nikon 24-70 3rd place Sony 24-70G
Canon EOS SLR Camera Lens EF 24-105mm f/4 L IS USM
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Canon EF 40mm f/2.8 STM Lens - Fixed Black (6310B002) for US Cameras
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Nikon 35mm f/1.8G Auto Focus Lens for Nikon DSLR Cameras - Black (Model 2183)
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