The magnetism part of this post prompts my question. Light is an electromagnetic wave, it has a magnetic field vector. If you place a strong magnet in the light path, will not the light path be altered. Might this give rise to image alterations. Is there a test to discover what.
Sergo wrote:
You can check out the Xume lens adaptor from Manfrotto, also available through Amazon.
They consist of 2 metal rings available in all sizes to fit any lens. One ring attaches to the lens, the other, to the filter. They are magnetic and to attach the filter, just hold it close to the lens and it will snap into place. The magnets are very strong. I've never had one fall off or get knocked off. Now attaching a filter takes only a second and no more stuck threads!