Rollei Premium Round Filter ND User Manual
Premium Round Filter ND
1. Gorilla®* Glas
Thanks to its unique surface coating, the filter glass
resists even the most adverse environmental conditions such as scratches and shocks or constant contact
with the material. Distortion-free and highly light
trans missive, this special glass is used for particularly
high-quality photo products.
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Extremely robust anddurable
High translucency
No optical distortion
2. Luminance Coating
This special coating considerably increases the resistance
of the optical surface to scratches and damage. At the
same time, of course, the colour fidelity and light transmission of the various filter models are retained
to their full extent.
Highest colour fidelity
Low reflections
Scratch-resistant
3. Engineered & Quality Controlled In Germany
Strict technical guidelines
Individual quality control in Germany
Special measuring procedure
Engineered &
Quality Controlled
in Germany
Image with ND filter
Image without ND filter
ND1000ND8
ND64
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.
Technical data
Neutral grey filter IR ND8 ND64 ND1000
Optical density 0.9 1.8 3.0
F-Stop reduction 3 stops 6 stops 10 stops
Degree of permeability 12.5 % 1.563 % 0.098 %
Material Gorilla®* Glass, Ring made of aluminum
Available in the Ø 49, 52, 55, 58, 62, 67, 72, 77 and 82 mm
*Gorilla® is a registered trademark of Corning Inc.
Image with polarizing filter
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