The Cokin Filter X073 Center Spot WA Grey 2 allows you to emphasize the centre of an image while blurring the surrounding area with a grey colour. This filter allows you to add a dramatic colour effect to your photos.
The filter is directly influenced by the set aperture and the focal length. If you use a larger aperture, the filter will have a softer effect on the photo. The size of the circular area that is rendered sharp becomes larger when using a longer focal length. Exposure metering must be done without the filter attached to the lens. If your camera has spot metering, you do not need to remove the filter from the lens to determine exposure.
Cokin X filter holder
The Cokin X series filters have a size of 130 x 170 millimetres and are made of high quality CR-39 organic glass. You will need an adapter ring and the Cokin Filter Holder BX-100A to attach this filter to your lens.