ROLLEI Profi ND Rechteckfilter Datasheet
Pro Square Filter ND
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High colour fidelity
Low reflection
Optical HD glass
Nano tempering
IR ND8
3 stops
IR ND64
6 stops
Image without ND Filter
Image with ND1000 Filter
IR ND512
9 stops
IR ND1000
10 stops
Modus operandi
ND filter is the abbreviation for neutral density filter. The ND filter is used to achieve a uniformly
moderate darkening of the image. In addition, it gives the image a uniformly neutral grey colour
so that the colour rendition cannot be altered.
An ND filter makes the subject darker by several guide values thus preventing over-exposed images.
Frequent applications for ND filters include taking shots with blur effects or of running water
under daylight conditions. ND filters are used with various degrees of darkening, depending on the
prevailing light conditions for the desired aperture and exposure time.
Picture with ND1000 filter
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Pro Square Filter ND
Other producers
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Technical Data
1. High colour fidelity:
Colour faults occur if the light attenuation does not cover the entire spectrum of visible light. For
cameras, visible light is between 420 nm ~ 680 nm. The higher the rate of light attenuation, the less
the amount of visible light that penetrates the filter, and the spectrum curve is not flat. If light can
penetrate the filter uniformly, there is then no colour fault. Rollei filters meet this important
requirement.
Other manufacturers
Resin Glass GND Grey area T%
100
80
60
40
20
0
350 450 550 650 750 800
NM
Other manufacturers
Laminate Glass GND Grey area T%
100
80
60
40
20
0
350 450 550 650 750 800
NM
Rollei
Nano coating GND Grey area T%
100
80
60
40
20
0
350 450 550 650 750 800
Nano-coated glass GND curveResin Glass GND Curve Laminate Glass GND Curve
NM
2. Low reflection (anti-reflective):
The double-sided anti-reflection coating prevents the high amount of reflection from metal
coatings such as aluminium or chrome. Moreover, the double-sided coating is waterproof, anti-glare,
anti-reflective and reduces reflections. In addition the filter can easily be cleaned.
3. Optical glass and HD (High Definition):
The filters are manufactured from fine, tempered H-K9L optical glass. Because of the double-sided
grinding and polishing, the glass is finely executed and is thus of the highest quality.
4. Nano coating:
The filters have double-sided coatings, nano tempering and a water and oil-repellent coating. The
nano coating is the foundation for extremely high colour-fidelity and low reflection so as to reduce
light scatter and glare.
5. Scratch-resistant:
High-quality materials and high-performance tempering make Rollei professional filters
scratch-resistant and easy to clean.
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