Clearance filters will arrive with cosmetic defects. Examples of a cosmetic defect are light surface scratches, smudged AR coating, or other small defects in the filter glass itself. These issues will have very little to no effect whatsoever on image quality. However, due to their appearance, they can not be sold as brand new, unused items.
Yes, this filter has full brass front and rear threading for smooth attachment and stacking. Our ND filter is compatible with all standard lens filters as well as our Infrared lens filters.
Yes! This filter is engineered to be used for visible light photography with no vignetting or color tinting. It also has the most effective IR neutral darkening we’ve produced to date, making it the ideal ND for Infrared long exposures and video work.
The refractive index is dependent on the material, and is a measurement of the amount that that material will refract or “bend” light as it passes through. At 90 degrees or dead center of the filter the light does not deflect and continues straight, but as the angle of incidence towards the edge of the filter increases, it deflects light more and more causing a discrepancy across your frame, particularly with wide angle shooting. The higher the refractive index value, the more image quality can suffer.
Before and after photos were taken by les deux piedsdehors, for full review on our filters visit their blog.
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