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Categories: Lens Filters
This 62mm Variable ND Filter from Tiffen offers a unique way of maintaining control over your depth of field and presents an efficient way to create special effects. Designed with a built-in rotating ring that controls neutral density ranging from 2 to 8 stops (0.6-2.4), it allows heavier density for a slower shutter speed. The longer exposure allows the shutter to remain open long enough to record the same amount of light, but will also create movement within the shot. It eliminates having to buy and carry around individual neutral density filters. With this one filter, you can rotate to the degree of ND you want, saving money and time.
Simply mount the filter on your lens, set it to "Min" density, then frame and focus. Care must be taken when focusing at heavier densities to make sure focus is accurate. If it isn't, you can switch to manual focus and rotate to the desired degree of filtration.
For example, if your standard exposure without the filter is 1/500 at f/8 and you then set the filter to "Min", you change the shutter speed to 1/125 at the same aperture - thereby losing 2 stops of speed while gaining a hint of blur in the image. If that's not enough filtration, continue rotating the filter until you reach the shutter speed you desire. Using the above example, you can get down to 1/2 second at f/8 (8 stops). It should be noted that the calibration marks on the filter ring are to be used only for reference and should not be regarded as accurate settings for specific densities.
Neutral Density filters are used to create unusual special effects including capturing the blur of rippling water in a waterfall or the swirling effect of city traffic. Since it allows the use of slower shutter speeds in bright light, it becomes possible to create special effects that would normally not be possible without the filter. Since it can also help control your depth of field, it permits you to shoot at wider apertures. Ultimately, its value is in helping to prevent bright, overly washed-out images shot in bright light.
The ColorCore process allows Tiffen to control the color and density of their filters, and the characteristics of special effects filters with greater accuracy than typical dyed-in-the-mass filters, which usually exhibit color and density variations. In this way, Tiffen can better control the various densities of their filters and thereby create more exact degrees of filtration.
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