Box Lens Setup Guide

Finepoint Broadcast – Box lens bullet points


  • Ensure a sturdy base to mount the rig, always use skids to avoid the tripod doing the ‘splits’.
  • Ensure supporter/lens connector is not damaged or bent.
  • When hanging the lens on the supporter, take extreme care not to damage the connectors and a 2 person lift is advisable.
  • Position supporter pin correctly and adjust after lens is installed on supporter, this is essential for correct camera alignment.
  • Camera supporter height must be correct to avoid damaging lens/camera flange, this is also essential for correct camera alignment.
  • Make sure lens lock knob is tight.
  • Check condition of lens flange.
  • Plug in iris cable to camera before attaching to the lens flange.
  • Check remote cable condition and ensure there are no bent pins.
  • Make sure remote cables are routed to avoid being crushed.
  • Cam/Ext switch on supporter must be in correct position depending on how the lens is powered.
  • Don’t manually force extender knob, or hold it when it is being operated by the servo.
  • Don’t undo focus demand drag knob forcefully.
  • Ensure servos are seated correctly, this is particularly important if lens is being used at height.
  • Ensure tripod head is properly balanced.
  • If lens has a stabiliser, make sure it is set to a suitable mode with the switches on the side of the lens. It is most effective to dampen constant vibration but can occasionally cause a slight pan shift. When the extender is operated, it will switch off the stabiliser.
  • While adjusting back focus always have iris wide open, and use the same subject at wide and tight end.
  • If focus demand lamp is flashing, it has yet to initialise.
  • Always use a clean cloth on front element.
  • Always leave the zoom at the ‘wide’ end before packing away.
  • Taking the lenses from a warm to cold environment will always cause ‘fogging up’, this is normal and will clear when the temperature stabilises.
  • Excessive fogging will often be caused by the lens being left wet. Always use a rain cover and keep the cases from getting wet. If the lens is wet it must not be packed up, but left to dry out of the case and left switched on if possible. If a lens gets very damp it will often never dry out.