At first I want to apologize for my English.
I'd like to ask you about distance measure equipment.
There are two kind of range finder on the market: ultrasonic(CineFlow, ARRI UDM, etc) and laser(cfinder iii). It's have very different specification.
+ wider angle of measure
-short distance of measuring
+speed of measurement
-low angle of measure (probable <1°)
What is the better kind of range finder in your opinion? I mean a practical use on set. Most part of time you make deal with less then 15 meters (50 foot) set and ultrasonic equipment can work with it. From my point of view laser range finder is worse because it have a low angle of measuring beam, and for this reason if you want to use auto focus function you may meet with a problem like beam doesn't hit an actor.
What do you think about it?
What kind of distance measure equipment do you prefer?