I recently bought a Filmcity camera rig and a nice two-stop FC follow-focus to go with it..using them with a Canon DSLR camera. On trying out the follow-focus I'm noticing that as I begin to turn it one way or the other, the camera lens will kick up or down ever so slightly as the torque from the follow-focus begins to transfer motion to the gear ring on the lens. Once it's turning then things seem to settle back as normal, and if I verrrry slowly start the movement then it seems to be minimized or not occur.
I've tried using a Canon 55-250 lens as well as the basic 18-55 short lens, tightening the camera down as firmly as possible, and still it seems the follow-focus wants to raise or dip the lens a tiny bit as it starts to adjust the focus. The problem may not be a game stopper, but obviously it means that when filming you're going to see the image rise or dip slightly when you start to turn the follow-focus...which is frustrating.
My guess is that the width of the DSLR camera, held by the single 1/4" screw, just doesn't give enough base area to hold the camera firmly on the rig, but there must be some way to deal with this.
Anyone seen this before and know of a solution to it?
I've tried using a Canon 55-250 lens as well as the basic 18-55 short lens, tightening the camera down as firmly as possible, and still it seems the follow-focus wants to raise or dip the lens a tiny bit as it starts to adjust the focus. The problem may not be a game stopper, but obviously it means that when filming you're going to see the image rise or dip slightly when you start to turn the follow-focus...which is frustrating.
My guess is that the width of the DSLR camera, held by the single 1/4" screw, just doesn't give enough base area to hold the camera firmly on the rig, but there must be some way to deal with this.
Anyone seen this before and know of a solution to it?