B+W Graduated ND Filter 701
The neutral density half of this graduated filter with a transmittance of 50% (1 stops) darkens the relevant motif area by one f-stop without affecting the colour. For example when the sky is too bright relatively to the landscape, this is the ideal value for a perfect colouring of the clouds with no fading of the blue sky caused by 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 filter 701 is 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)
The graduated ND filters are provided with a high quality MRC coating. MRC (Multi Resistant Coating) coated filters have an MC layer ensuring a high transmission and maximum anti-reflective surface. Scattered light is eliminated and by this means achieving more brilliant colours and higher contrasts. Due to the low residual reflection MRC reliably avoids ghost images possibly caused by re-reflection from the sensor surface. In addition, MRC prevents the filter from scratches by means of an increased layer hardness, at the same time maintaining the high optical quality. Furthermore, MRC is dirt and water repellent and makes cleaning much more easier.
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