Lockcircle Prime Circle Optical Clear Filter 4×4
The Prime Circle Optical Clear filter 4×4 from Lockcircle, is designed to provide protection for the lenses and does not usually incorporate any effect.
Every camera and lens should have a Optical Clear filter attached as a matter of course when shooting in dusty, moisture, dangerous camera car and action shots.
The filter protects your expensive photo and cinema lenses from damage of the front optical element.
PrimeCircle filters are diamond cut from German Ultra-White optical glass, the best quality solution for modern high resolution lenses! The parallel relationship between front and rear surfaces (important for the best optical performance) is verified with a laser interferometer and a densitometer is used for testing consistent density. To check proper light transmission is also used a spectrophotometer!