Cokin Z-PRO 154 Gray Neutral Density (ND) 8x Resin Filter - Neutral Density filters have several uses and offer the possibility to achieve otherwise unachievable results. ND filters appear gray and reduce the amount of light reaching the film. They have no effect on color balance.
Determining which neutral density filter yields ideal results for any given lighting situation takes knowledge, experience and a collection of such filters. Speaking generally, the 2-stop value (ND 0.6) effectively compensates average situations.
Z-PRO Filters are made of CR39 Resin which is a reputable lightweight and unbreakable optical material also used for ophthalmic glasses.
The Z-PRO Series is recommended for focal lengths of 20mm onwards (in the 35mm format).
Note! This filter measures 100 x 100mm (4 x 4") and fits the Cokin Z-PRO Filter Holder
Neutral Density Filters Have Four Main Uses
To enable slow shutter speeds to be used, especially with high speed films, to record movement in subjects such as waterfalls, clouds, or cars
To decrease depth of field by allowing wider apertures to be used, which helps separate subjects from their background
To decrease the effective ISO of high speed film (above ISO 400) and allow it to be used outdoors in bright situations
To allow cine and video cameras (which have fixed shutter speeds) to film subjects such as snow, sand or other bright scenes which could cause overexposure
Neutral Density Factors
Cokin 152 (exposure adjustment = approx. 1 stop, reduces ISO by 1/2)
Cokin 153 (exposure adjustment = approx. 2 stops, reduces ISO by 1/4)
Cokin 154 (exposure adjustment = approx. 3 stops, reduces ISO by 1/8)
Beyond the spectrum of light visible to the human eye which is roughly between 400 and 700nm, one finds infrared light, which we can perceive by way of special films, black and white as well as colour, and today, via digital sensors, at least those without anti-IR filters.
In order for these different media to fully record the effect of the inner spectrum of infrared light, one needs a filter that blocks the visible spectrum and lets infrared light pass through. That is precisely what the 007 filter does.
The resulting image will vary considerable depending on the film or sensor used.
Black and White With infrared black and white film, the image taken will have a characteristic aspect: blue skies will become almost black and vegetation will take on various shades of white, giving it a surreal appearance.
Colour With infrared colour film, the image will present absolutely surrealistic tones, shifting colours.
blocks all visible light up to 650nm, allows 50% of light to 720nm and more than 90% of the infrared and beyond
For Digital camera, or Film camera with B&W films. With a Digital camera, can be used in either color mode, or B&W mode. For Black&White mode, set the menu on “B&W” position and use it like a Film camera.Orange filter increases the contrasts between reds and yellows. It darkens the skies, accentuates clouds and strongly subdues ambient light. For architecture photography, it helps to bring out the texture of the monuments’ stones.
Color correction filter which decreases the color temperature from 3400°K to 3200°K (makes it more red) to reduce the blue cast and warm-up the tones. Great filter for landscapes or portraits (to warm-up the skin).