Built using reduction gearing, 360 degree rotation of the thumb wheel gear results in 90 degrees of rotation of the main gear. This allows us to calibrate the thumb wheel gear in units between 2 and 8 stops of light reduction. Note, the stop calibration is approximate.
Quick and easy insertion.
The
handle has a standard 1/4 20 thread to allow mounting a motor. If the
motor is synchronized with the lens aperture a variable depth of field
effect can be achieved.
The Brilliant²
4x5.65/138mm 1-Slot Variable Neutral Density Filter is 6mm thick and is
designed to fit in most 4x5.65" matte boxes.
Our Variable Neutral Density filters are constructed using two
Lindsey Optics 138mm Brilliant Pol circular polarizers. One of the
polarizers rotates and the other is fixed.
As with all circular polarizers, the Brilliant Pol Circular Polarizers are constructed with two internal components, a linear polarizer that will reduce reflections when rotated and a "quarter wave plate" that spins the light. When one of our circular polarizers is used as polarizer, the quarter wave plate faces the camera lens, depolarizing the light entering the camera lens, preventing any cross polarization inside the camera and lens system.
When we build our Variable ND filters using these circular polarizers thie glass is oriented with the quarter wave retarders facing out, effectively de-polarizing on both sides. This prevents accidental polarization effects in the scene and allows the Variable ND to be inserted into the matte box in either orientation.
The Lindsey Optics Brilliant-Pol Polarizing Filters used in our
Variable Neutral Density filters are constructed using Schott B270
"water white" optical glass and have a broadband multi-layer
anti-reflection coating which dramatically reduces flare, stray light
and ghost images caused by filter to filter reflection. Contrast and
color saturation are increased. They are ground and polished to be very
flat and will not cause distortions or focus shifts, even with long
focal length lenses.
The included large 138mm diameter polarizers give a large 5.1" clear aperture, useful even with wide angle lenses and large zoom lenses.
Change of density can be done by spinning either of the two thumb wheels by hand or with a motor mounted on the 1/4–20 thread in the handle.
Our superior mechanical design includes an all-aluminum main gear in which the138mm Brilliant Pol Circular Polarizer filter is mounted. That main gear rests on internal Delrin™ rollers for smooth rotation no-slip rotation, The main gear is driven by aluminum thumb wheels that are geared with standard 0.8 pitch gear teeth for use with motorized wireless remote systems.
When used behind our RotaPol, the Our Variable ND works beautifully and both polarization and neutral density can be controlled with motors and wireless FIZ system. The Rotapola MUST be in front of the Variable Neutral Density filter (world side) for this to work.
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States that require collection of Internet Sales Tax will be subject to sales
tax.
(California residents will have to pay 9.5% for sales tax.)
Free shipping in US by USPS. $19.99 by FedEx 2nd day air.
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described the item to complete satisfaction. Please email with any
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KEY WORDS: ARRI ARRIFLEX RED TIFFEN PANAVISON