I do astrophotography. My workflow in the field involves manually focusing the lens, and then mounting the camera on my tracker and shooting multiple frames. Once mounted on the tracker, checking focus is cumbersome.
One of the key sources of bad data, and sometimes whole wasted nights, is focusing errors. It is very easy to bump the focus ring to throw things off slightly, just enough to create unacceptable frames. Things get even trickier when a lens heater is needed.
Is there a way to turn off focusing completely - i.e. no autofocus and no manual focus. In theory one should be able to turn off manual focus because modern R mount lenses are focus-by-wire and there is no mechanical coupling between the focus ring and the lens elements. I want to focus my lens at the start, and then leave the lens elements where they are.
My camera is an RP.
One of the key sources of bad data, and sometimes whole wasted nights, is focusing errors. It is very easy to bump the focus ring to throw things off slightly, just enough to create unacceptable frames. Things get even trickier when a lens heater is needed.
Is there a way to turn off focusing completely - i.e. no autofocus and no manual focus. In theory one should be able to turn off manual focus because modern R mount lenses are focus-by-wire and there is no mechanical coupling between the focus ring and the lens elements. I want to focus my lens at the start, and then leave the lens elements where they are.
My camera is an RP.
