The Cokin White Oval Center Spot filter has a clear center and diffused edges. These diffused edges will be produce blur while leaving the center sharp. The filter effect is directly influenced by the f-stop and the focal length. A lens shot at f/1.4 will see a greater blurring effect than f/8.0 and a 85mm lens will see more blur than a 28mm. Additionally, a longer focal length lens will visually increase the size of the center spot area because it sees less of the filter area.
L (Z) - 100mm x 100mm x 1.6mm
XL (X) - 130mm x 130mm x 3mm
|C39 Optical Resin
|1 - White Oval Center Spot Filter (140)
L (Z) 85831701401