Coupled this x2 TC with my nikkor 80-200 f2.8 ED on my D7100, D300 and D3. Works perfectly! Super sharp and stops down the f2.8 to f5.3 so still perfectly usable in average to good light. I've only noticed a very slight drop in resolution on the D7100 not enough to even worry about and true perfect images on my D300 and D3. Couple this up to good fast glass and you get a cheep pro super zoom!