SIRUI Square Graduated Gey Filters 100 x 150mm for NDH100

What are SIRUI graduated grey filters?
Soft and hard graduated grey filters have a grey gradient from the filter edge to the filter centre. Reverse graduated grey filters have a hard grey gradient to the centre and a soft grey gradient to the upper edge of the filter. Depending on the density degree, the filter can be lighter or darker. This means that part of the image is darkened. This is especially useful if the conditions have significant differences in brightness, e.g. A bright sky with a dark landscape or sunrises.

Why do you need a graduated grey filter?
Our eyes can adapt to differences in brightness and contrast in the environment at any time. On the other hand, cameras do not have this ability. Even the very latest models only have a limited ability to capture a certain amount of light and dark areas in the image. Graduated filters are used to compensate for this "flaw". An overly bright sky can therefore be darkened by the filter, making the overall picture harmoniously exposed without losing any details.

SIRUI SGND 100 x 150mm Soft Square Graduated Grey Filters
A soft graduated filter is perfect for subjects such as landscapes or skylines where the horizon is not clearly defined (e.g. as a result of trees, mountains or houses). The result is impressive images with detailed clouds in the sky and a properly exposed foreground.

SIRUI HGND 100 x 150mm Hard Square Graduated Grey Filter
A hard graduated filter is perfect for subjects with a clearly defined horizon (e.g. the sea). The result is impressive images with detailed clouds in the sky and a properly exposed foreground.

SIRUI RGND 100 x 150mm Reverse Square Graduated Grey Filters
An inverted (reverse) graduated filter is perfect for subjects with a bright centre of the image (e.g. sunsets or sunrises). The result is impressive images with properly exposed light and dark areas.

Materials and Manufacture
The high quality of SIRUI filters begins with the material: they are manufactured from German Schott glass. The glass is fire-polished, ensuring a perfect optical surface. This process also makes the glass extremely robust and resilient. Rounded corners and polished edges make the glass shatter-proof. This also makes it easier to insert the filter into the holder. The precise manufacturing meets the highest standards. Accurate measurement procedures and strict quality control ensure consistent quality of the filters.

2mm thick German Schott glass
• highly translucent
• distortion-free image across the whole filter surface
• solar stability (does not change when exposed to solar radiation)
• high chemical resistance
• fire-polished for a perfect optical surface
• extremely robust and resilient

Additional protective film on both sides
• water-, grease- and dust-repellent
• scratch-resistant
• extremely robust and resilient
• anti-static
• easy to clean

Ultra slim multiple nano-coating on both sides
• maximum light transmission
• linear and full-surface reflection reduction
• accurate colour reproduction and colour fidelity

Exclusive grey film coating on both sides
• perfectly linear light reduction from filter edge to filter edge
• uniform darkening with stable colour cast and contrast stability

Square Filter Graduated
Square Filter Graduated

Specifications
Measurements HxWxD: 100 x 150 x 2 mm
Weight: 78 g


Models 
SIRUI 100x150mm Square Graduated Grey Filters
• SOFT: SGND4 (0.6) | SGND8 (0.9) | SGND16 (1.2)
• HARD: HGND8 (0.9)
• REVERSE: RGND8 (0.9) | RGND16 (1.2)

Compatibility
• Filter holder system for 100mm wide filters
SIRUI NDH001 100mm filter holder

Included
1x SIRUI GND 100x150mm square graduated grey filter
1x Padded bag