The new ones (without the screw) seem to fit pretty snuggly. We still put some double stick (outdoor flavor) under the tab at the top.
The ones we've re-visited seem to be staying on. bp On 10/28/2014 3:35 PM, Peter Kranz via Af wrote:
Are you supposed to add some kind of adhesive to keep the focus ring from blowing off?** *-Peter*