microTape real-time range finder is a professional-level accessory to aid in accurately judging focusing distance.

onar Rangefinder for Filmmakers

The microTape employs powerful but harmless sonar that displays distances up to 21' feet, and delivers this information in real-time via its large format display.It can be used safely on any type of subject, including people, animals, objects, furniture, etc. An integrated laser pointer is available at the touch of a button to accurately aim the microTape as well (a word of caution: this a laser, so you'll want to take precautions not to shine it anywhere near eyes).