Thanks for all your advice.
I've downloaded the LR5 beta, and I'll have a play with it.
Canon 5D3 , 70-200mm f/2.8 L IS II , 24-105mm f/4 L IS , 50mm f/1.4 , 85mm f/1.8 , EF 2x III , Samyang 50mm T/1.3
Canon EOS M3 , EF-M 18-55 f/3.5-6.3 , EVF-DC1
Olympus OM2-SP , 50mm f/1.2 , 55mm f/1.2 , 50mm f/1.4 Silvernose , 135mm f/2.8 , 28mm f/2.8