Optical Low Pass Filter (OLPF) for Blackmagic URSA Mini Pro 4.6K
Aliasing and moiré are common issues in digital imaging. To reduce these issues, many digital cinema cameras — including cameras from ARRI, Sony and Canon — have a built-in optical low-pass filter (OLPF).
The original IR absorption filter of the URSA Mini Pro 4.6K does not include an OLPF. Blackmagic made it easy to replace its IR absorption filter with an optical low-pass filter. The filter is held in place by three screws. After removing it, these same screws can be used to install the precisely fitting Rawlite OLPF.
‘We were filming a variety series using Blackmagic URSA Mini Pro G2 cameras and were having serious moiré issues with the screens built into the set. When we discovered Rawlite’s OLPF solution, we ordered immediately, and it made a dramatic improvement, almost completely eliminating the issue. This will extend the usable life of our cameras for years. We’re very happy customers.’
– Marc Savoie, Connexions Productions
The Rawlite URSA Mini Pro 4.6K OLPF is specifically designed for the URSA Mini Pro 4.6K (G1 and G2), significantly reducing moiré while preserving detail. A hot mirror coating is added to cut infrared. An anti-reflective coating helps prevent unwanted reflections.
The Rawlite URSA Mini Pro 4.6K OLPF works well with the internal NDs. No more moiré, no more IR contamination.
The Rawlite OLPF is thicker than the original filter. Consequently, a shim is needed to correct back focus. The shim is included in the kit, as well as the tools needed for installation.
