This .25x fisheye lens achieves extremely wide angles of view by foregoing a rectilinear image to give fisheye images their characteristic convex appearance. Dont confuse this .25X quality Precision Design optic with.42X/.45X... Panoramic...Super Wide Angle... Semi Fisheye...Titanium... Crystal Optics type lenses whose rear elements unscrew to be used as macro lenses. They can not even approach delivering a high quality 180 degree field of view. The all glass high resolution optics of the Precision Design .25x Super Fish Eye is manufactured in Japan and have been engineered to do one thing and do it well; reduce the focal length of a lens by .25X to provide an amazing fish eye view. Depending on the camera model and lens its mounted upon, the image can cover the entire frame edge to edge or provide a circular image fully contained within the frame. Mounted to a zoom lens, the Precision Design .25X can often offer ultra wide angle, diagonal fisheye (full frame) and circular fisheye images. Close focusing is almost to the front of the optic and theres huge depth of field. The .25X can be a great tool for real estate agents or for just having fun! If you plan on doing panoramic or full room shots, just stand your tripod in a corner facing the center of a room. It can capture almost EVERYTHING, floor to ceiling, wall to wall, except what is directly behind the camera. Just import the resulting image into a panoramic editor/ stitching program (your digital camera probably came with one), convert it to a QuickTime VR file, and have a virtual view of the room. The Precision Design .25X is the affordable fisheye optic for useful, unusual and fun pictures you otherwise wouldn't be able to obtain >>> WILL WORK WITH ANY LENS WITH A FILTER SIZE OF 52mm, 55mm, 58mm & 62mm (All 4 rings included) which includes most Nikon, Canon, Minolta Maxxum / Sony Alpha, Pentax, Tamron, Sigma, Tokina and other Major brands lenses
