2007منتدى Follow Focus
أدوات قياس المسافة الرقمية للتركيز
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- Sonar-based focus distance measurement devices were developed by manufacturers including Panavision with their Panatape system and CE with the Cinetape, which use ultrasonic horns that emit and receive sonar signals bouncing off subjects to calculate distance
- These sonar systems allow operators to set parameters to ignore certain distances or foreground elements like flags or actors to avoid false readings
- Laser-based focus distance measurement devices such as the Sniper use infrared wavelengths safe for actors' eyes, with some versions including a visible-spectrum aiming laser for setup purposes
- Laser-based systems can provide accurate distance readings on mirror shots and through windows due to how laser light behaves similarly to camera light
- These distance measurement tools are primarily rented from camera rental houses, though some focus pullers purchase them for personal use
- Sonar and laser systems function as checking aids rather than primary tools and can become counterproductive if operators rely on them without maintaining traditional focusing skills
يعتمد على
- Discussion dates to 2007 and technology may have evolved significantly since then
- Sonar devices can be interfered with by certain environmental factors or foreground elements requiring manual filtering
- Both sonar and laser systems require proper setup, balancing, and power management on camera rigs
- Details about the Sniper's infrared safety and capabilities are acknowledged as approximate by the participant