firewallet
Well-known member
Here is what Mr. Stump had to say about focus (he also said that he could be quoted as long as it was verbatim):
"for example the lens mount is bolted to a big black
metal box, and the lens mount is not exactly square to the sensor, so
one cannot count on perfect back focus distance or side to side focus,
but that is to be expected in a testbed."
"As I said in the posts, the sensor is not square to the lens in the
prototype, so back focal distance is not good side to side, it would
be wise to eval intrinsic camera focus quality from some of the
material done at deeper stops, in order to take the back focus issues
out of the equation."
Dave Stump ASC
DP/VFX Supervisor
"for example the lens mount is bolted to a big black
metal box, and the lens mount is not exactly square to the sensor, so
one cannot count on perfect back focus distance or side to side focus,
but that is to be expected in a testbed."
"As I said in the posts, the sensor is not square to the lens in the
prototype, so back focal distance is not good side to side, it would
be wise to eval intrinsic camera focus quality from some of the
material done at deeper stops, in order to take the back focus issues
out of the equation."
Dave Stump ASC
DP/VFX Supervisor
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