|The VAF-7D is very simple to remove from the 7D. As before, please note:
Cleaning If you accidentally touch the filter's coated optical surfaces, fingerprints can be easily wiped away using a just a single drop of alcohol on a piece of soft cotton cloth. Most alcohol-based lens cleaners can be used as well. As with any optics, avoid vigorous scrubbing, and be careful not to drag abrasive particles across the surface.
Camera OFF while Mounting / Dismounting Lens If certain older EF lenses are removed from the 7D while it is turned on, their iris setting may be misread by the camera when they are reinstalled. (This issue is unrelated to the VAF-7D, and can happen even if the VAF-7D isn't being used.) The power on/off instructions included below will ensure that this doesn't happen. If you inadvertently remove a lens with the camera on and cause this to occur, the solution is just to manually adjust the camera iris control to fully open the lens, and then to re-adjust it to your desired f-stop.