Certainly if a director says "I will use this camera" then one should listen, but in general the DP is there to decide such things.Senensky seems to be saying that Finnerman introduced the new wide angle 9mm lens to Senensky back during "Metamorphosis," but that it was actually Senensky's decision to use it again in "Is There In Truth...," not Finnerman's. But maybe I'm just misunderstanding him.
Senensky talks about working with Finnerman here:
http://startrekhistory.com/interviews.html#RALPH