fisheye lens camcorder lens camera lens 72FE2304 Fish - eye CONVERSION LENS -------------------------------------------------------------------------------- performance description Fish-eye Conversion lens is designed to get a 180 degrees wide angle view suitable with as many as digital camera models available in the market, and it may create a slight ' vignetting ' at the corners of the picture captured with some camera model set at the widest position of the zoom lens.Fisheye lens belongs to super wide angle lens,it is a special lens.which view angle can reach or go beyond the range of people's eyesight.in real life people only can see the well-regulated and fixed form,well all these things will be changed by the fisheye lens,by which theimage will be changed even to go beyond the area of human' eyesight.Just because of this exaggerative distortion,it is welcome by the photographer lover,in order to reach the super view of 180 degree,the disigner of the fisheye has to give in,that is to permit the distortion(barrel distortion)exist reasonably.The result is only remain the center scenery not changed ,other horizontal of vertical scenery is changed relevantly.well just this sharp vision effectprovides the photographer who is full of imagination and challenge with opportunity to show individual creativity.If you do not like to have the ' vignetting ' effect during picture taking, zoom the camera lens slightly towards telephoto side. ' vignetting ' means that the four corners or a corner of the picture is cut off or darkened slightly.There will be no reduction of light value when this conversion lens is attached on the camera's lens. Measurements Actual 180-degree Diagonal, 0.20x Horizontal Barrel finishing silver or black Lens coating Multi-coated Magnification Nominal 0.20x Lens construction The 2-Diopter - 1-group/2-element Front Filter thread Rear Mounting thread 72mm Dimension φ116.0x38.77 mm focus' = - 34.02 Degree more than 150 Distoration: 100% λ°= 500 Can be with space ring 72mm to 72mm Weight 0.298KG Accessories a conversion lens a blac lens bag a microfiber cloth a high quality ABS plastic caps or rubber caps