Originally Posted by
rogerstv
Lab Radar appears to be the choice of long range shooters and accuracy chasers. They are expensive and I believe you must attach it to the barrel which affects harmonics.
Visit the Long Range Hunting Forum for extensive chronograph discussion.
You have confused the Lab Radar with the Magnetospeed chronograph. The Magnetospeed is attached to the barrel, and a Lab Radar is not. Both are fairly expensive and very accurate.
To the OP: If you want to measure arrow speed and do not want to pay the cost of a Lab Radar you will have to live with sky screens.