Received the A650IS lensmate adapter today.
"Introducing the Lensmate PowerShot A650 58mm lens adapter. Like all our lens adapters, the A650 adapter is machined from 6061 aluminum. It's then bead-blasted and anodized black to match the finish of the A650.

In addition to allowing the use of filters and conversion lenses, the adapter protects the delicate zoom mechanism and lens from the inevitable bonks of everyday usage, as well as allowing the camera to be left on indefinitely with the lens extended in street-shot mode, instantly ready for that decisive moment. It also allows the use of a conventional clip-in lens cap, which stays in place until removed."

http://www.lensmateonline.com/

This is a well crafted adapter and I have used one for the Canon A80.
Only cons is when looking thru the viewfinder, it is blocked by the adapter so LCD use is a must.
Will be useful when going to the beach and prevent the sand/wind from blowing into the lens and the zooming mechanism.

210mm Extended lens out