Introduction: High Quality! Never Used! Neutral density filters are used to control exposure with mirror-lenses catadioptric optics, since the use of a traditional iris diaphragm increases the ratio of the central obstruction found in those systems leading to poor performance. This slim ND1000 filter can effectively weaken the light. Its ultra thin frame is to help avoid the vignetting on super wide angle lens. It can be used to get following exact functions:
Suitable for: Fit SLR camera / digital camera with lens of 49mm filter diameter.
|