I am disappointed in the performance of the af on my d600, I shoot a lot of aquarium photography under strange and low light conditions and the camera struggles with the subject coming towards the camera it just doesn't lock react quick enough, I'm using af-c and single point ...the Lens used in the instance is a Tamron 90 mm macro( latest gen) .... My D3100 seemed to cope better ! Any suggestions ?
Cheers
Simon
Cheers
Simon