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The Kood A Series Split Field Filter is designed for use with a Kood A Series or Cokin A Series Filter Holder. This filter consists of a squared frame with a circular area inside it. Occupying half of that area is a close-up lens with a +3 strength diopter for use in achieving macro-like results with almost any camera lens whose front element can be covered by the circular area. Close-up lenses are magnifiers that optically decrease the focal length of a camera lens they are placed on. This effect lessens the minimum focus distance between your camera lens and an object. Magnification can then be obtained while photographing an object by moving the front of the camera lens close to it.
The magnifying power of a close-up lens is indicated by its diopter strength. A close-up lens with a higher diopter number provides more relative magnification and can be combined with other close-up lenses to increase or fine-tune its effect.
When using the Kood A Series Split Field Filter with another filter in front of it, an empty filter slot must be allotted between the two filters. This is due to the outward curvature of the close-up lens that occupies half of the circular area within the squared frame of the Kood A Series Split Field Filter. The other half of that circular area has no close-up lens element and is completely unobstructed, allowing a camera lens placed behind this filter to project an image where half of the frame is unmagnified. This provides the potential to place subjects magnified by the Kood A Series Split Field Filter within a discernible background, due to a close-up lens's secondary effect of only allowing a very shallow depth-of-field. The Kood A Series Split Field Filter can be effectively applied by lining up its close-up lens and the subject to be magnified with either the bottom or top front half as well as either the left or right half of the camera lens being used. By also using a narrow aperture, the resulting wide depth of field can be captured by the remainder of the camera lens that is not affected by the filter's close-up lens. A foreground subject can then be magnified and simultaneously, some focus can be maintained on a background that would otherwise be rendered completely out-of-focus.
Split-field design with close-up lens allows macro-like results for a foreground subject while providing the ability to render backgrounds with a wide depth-of-field
Allows magnified subjects to be shown within their environments
Optical glass construction of close-up lens
In the Box
Kood A Series Split Field Filter
Limited 1-Year Warranty
Table of Contents
Close-up lens filter
Kood A or Cokin A Series Filter Holders
Decreases minimum focus distance on a camera lens for magnification of a foreground subject while allowing background to be effectively rendered with a wide depth-of-field