Rollei Rock Solid Reverse GND Filter User Manual
Rock Solid Reverse GND Filter
100 x 150 mm
The Rock Solid filters are combining an extreme
robustness with highest color fidelity.
1. Unbreakable1) Coating
What makes the Rock Solid Filters special is there enormous strength. Thanks to the special coating on both
sides the filters are extremely robust and durable. If the
filter accidentally drops out of your hands while you
try to insert it into the filter holder, this will not lead to
any problem anymore. The coating protects the filter so
that you can still use it.
Break-proof
Pressure resistant
High toughness
Scratchproof
Highest colour fidelity
Low reflections
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2. Gorilla®* Glass
Thanks to its unique surface coating, the filter glass
resists even the most adverse environmental con-
ditions 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.
High translucency
No optical distortion
High color fidelity
Modus operandi
GND filter is the abbreviation for “graduated neutral density filter”, also termed grey graduated filter.
A grey graduated filter is used to balance the difference in brightness of the horizon.
The reverse grey graduated filter does not have any uniform grey distribution, but rather a grey
gradation that in the middle of the filter runs upwards from dark-grey to light-grey and runs
downwards, ending in transparency.
This type of filter is much used to take shots of the sunset and sunrise. The filter is particularly effective when the sun
is at the point where it meets the horizon and the light is strongest in the centre of the subject.
Technical data
Grey graduated filter Reverse IR GND4 Reverse IR GND8
Optical density 0.6 0.9
F-Stop reduction 2 stops 3 stops
Material Gorilla®* Glass
1) The Rock Solid filters can drop down up to 3 and 10 times from a height of 1.2 meters before they break. But please note as these filters are made out of coated glass,
damages or breaking are not completely impossible. We advise you that you should not throw these filters by purpose to prevent any damages.
*Gorilla® is a registered trademark of Corning Inc.
Image without ND filter
Engineered &
Quality Controlled
in Germany
3. Engineered & Quality Controlled In Germany
Strict technical guidelines
Individual quality control in Germany
Special measuring procedure
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Reverse GND4Reverse GND8
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