Rollei Premium Round Filter ND User Manual

Premium Round Filter ND

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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 transmissive,­ this special glass is used for particularly high-quality photo products.

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

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Image with ND filter

Image without ND filter

ND8

ND1000

ND64

Engineered &

Quality Controlled

in Germany

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.