Sorry, You are... ...wrong where it comes to viewing the image through an eyepiece on the device. Regards, Bob... From: "Don Roberts" <droberts@soli.inav.net> > My understanding of this is that there are simply two lenses. The first would > invert the image and the second would invert it again making it rightside up. > And I hate to disagree with authority but I have used these things mounted on > body caps and on lens caps to make surreal fisheye images. Don