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Radial Zoom
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This filter gives the effect of zooming a telephoto lens during exposure. It uses the same technique as the "speed" filter. The streaks of light radiating from the center of the frame suggest movement toward the camera. Here again, a mixed and preferably dark background accentuates the radiating streaks and so giving the impression of motion. Should not be used for subjects dominated by a light sky or which feature empty expanses of snow or water in the background, as it is the unfocused areas of a lively, disturbed background which emphasize the zoom effect. Technically this filter is a Center Spot filter
By night, it's the filter to use for neon signs, illuminated monuments, general views of the lights of the city, and the brilliantly lit avenues. By day, highly-colored subjects & backgrounds irradiate their colors with the same intensity.
Photos below by Dr. Ching-Kuang Shene
Do not use too small an aperture, or you'll see the filter rather than the effect.
When illumination and background are reasonably uniform, a Radial Zoom filter can create an effect that is similar to that of a diffusion filter
All photos shown on this site are the ownership of the Photographer and are not to be distributed in any way which may violate his/her copyright without permission from the copyright holder.
