>Thinking about primes, on FX do you believe it would be better >a 50/1.8d (which I have) or a 85/1.8G? >I am used to DX and on that the 50mm works fine, maybe a bit >long for chasing the kids around the house. >I have also a 28-75 2.8 Tamron that would work, but is having >some reliability issues (stops focusing sometimes).
The 85mm f/1.8 Nikkor is a fine lens. It's my personal preference. But I also think that a choice of lens is dependent more on your style of shooting, your preferred subject matter, and the sort of handling you prefer.