I have an Oly C2040 and have been reading posts/reviews about the Eagle Eye OpticZoom 5X used with this digicam, seems the vignetting is bad.

Sometime ago, CrystalVue promised a 43mm(?) mount 5X Telephoto Lens. Does anybody know about this?

I don't believe it's available yet - for more information on it you might check with Tom at CKC Power:

http://www.ckcpower.com

Lin