Is it necessary to lock the tilt and shift movements for each shot?

Question

The Canon TS-E 17mm F/4 has large knobs for shifting and tilting the lens plus small knobs on the opposite side of the lens for locking the shift and tilt movements.

It's already tedious to setup this lens, so I am wondering if it is necessary to tighten both locking knobs for shooting? Or are these more for transportation like a zoom-lock?

Asked by Itai

Answer

The main reason for tightening the locking knobs for shooting is that the lens can potentially change its current tilt/shift settings under its own weight.

Answered by Steven Cunningham

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