Hoya Multivision Glass filters are available in five types: 3PF, 3F, 5F, 6F, and 6PF. This "prism" type filter is generally used to create fantasy images. The multiple images appear to "revolve" around a central image. The number of images created is determined by the grade of filter purchased (i.e. 3F, 5F, 6F, etc). The effect is strongest with a relatively dark background and at larger apertures.
"F" models create a triangle around which float the same image. "PF" models are linear in structure creating a horizontal flow of the same image.
Note:
The multi-images appear closer together with wide-angle lenses and farther apart with telephoto lenses
As one of the premier filter manufacturers, Hoya filters continue to be made from quality glass assuring the photographer clear, sharp and accurate images
Hoya filters consistently provide even color all the way through the filter. All surfaces are ground and polished to specific thickness and tolerances
Even non-multi-coated Hoya filters have one layer of anti-reflective coating applied to each surface of the glass. Hoya's single layer coating decreases light reflection off the surface from approx. 9% to an average of 4-5%