Blend from normal camera to Look at tracking camera in sequencer?

Hi, I need to have a seamless cut or blend from a camera that is not set to track an object to one that is.

I have tried two ways

  1. One one single camera I have added an “enable look at tracking” track and set a keyframe from OFF to ON with the cameras in exactly the same positions at the point of switch.

It works but there is a very noticeable pop or small jump when it switches, even though the positions and rotations are set to exactly the same value?

  1. Two separate cameras both in the same positions when it switches but it gives the same result

Is there no way to form a smooth blend between the two instead of ON or OFF

ps this is not for a game but film / video, so needs to be working in sequencer
Many thanks in advance :slight_smile: