B+W Filter ND Graduated 701, 49 mm Basic MRC 50%. The neutral gray half of this graduated filter with a transmittance of 50% (1 f-stop) darkens the subject area in question by one f-stop without changing the color. For example, if the sky is too bright relative to the landscape, this is the ideal value for good cloud drawing and to prevent the blue sky from fading due to overexposure.
B + W graduated neutral density filters are often used in landscape photography in order to avoid an overexposure of the sky with a correct exposure of the ground. As in overexposured areas of the picture image information is normally lost the effect of this filter can hardly be simulated by electronic image processing. The filters are coloured neutral gray with a smooth transition into the neutral filter half. With screwed filter the rotatable mount allows an exact horizontal alignment.
The glass substrate of the B+W ND filters 701 and 702 are absolutely plane and parallel and finely polished. This guarantees a long lasting high optical quality. By means of thin layer technology the ND gradient is evaporated. The below values refer to the darkest filter glass parts:
- 701 +1 stop (50% transmission)
- 702 +2 stop (25% transmission)
Correct exposure over the entire image
B + W Graduated ND filters are invaluable in landscape photography and other situations where the subject is divided into two parts with different lighting conditions. Details in the bright sky can be highlighted without underexposing the landscape.
Multi-Resistant Coating (MRC)
MRC by B+W is not only an extraordinarily effective multiple layer coating, it is also harder than glass, so that it protects filters from scratches (for instance when cleaning the filters), and it is also water and dirt repellent, thus facilitating filter maintenance.
Basic filter ring
Basic filter ring is durable and robust due to brass mount with a better grip due to optimized knurl. Easier mounting due to new lacquer technology. Basic filters can be used on most lenses down to 24mm, size 24x36.
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The company, founded 1913 by Joseph Schneider, trades today under the name of Jos. Schneider Optische Werke GmbH. It manufactures for the world market high-performance lenses, photographic and industrial filters as well as professional accessories. Further product ranges are electro-hydraulic and electro-pneumatic servo valves for the machine constuction and industrial processing engineering as well as single and multiple focus lenses and graduated lenses for the ophthalmic optics. The company’s B+W brand for photo filters are established worldwide as premium products.
