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In a circular fisheye lens, the image circle is inscribed in the film or sensor area; in a full-frame fisheye lens the image circle is circumscribed around the film or sensor area. Further, different fisheye lenses distort images differently, and the manner of distortion is referred to as their mapping function. A common type for consumer use is equisolid angle.
Circular The picture using a circular fish eye lens The first types of fisheye lenses to be developed were "circular fisheyes" — lenses which took in a 180° hemisphere and projected this as a circle within the film frame. Some circular fisheyes were available in orthographic projection models for scientific applications.
These have a 180° vertical angle of view, and the horizontal and diagonal angle of view are also 180°. [edit]Full-frame Fisheye 10.5 mm Nikkor (type: equisolid angle), APS-C sized sensor, cropped to rectangle. A full frame fisheye lens for a 35mm camera As fisheye lenses gained popularity in general photography, camera companies began manufacturing fisheye lenses that enlarged the image circle to cover the entire 35 mm film frame, and this is the type of fisheye most commonly used by photographers.
The picture angle produced by these lenses only measures 180 degrees when measured from corner to corner: these have a 180° diagonal angle of view, while the horizontal and vertical angles of view will be smaller; for an equisolid angle-type 15 mm full-frame fisheye, the horizontal FOV will be 147°, and the vertical FOV will be 94°.[2]
The first full-frame fisheye lens to be mass-produced was a 16 mm lens made by Nikon in the late 1960s. Digital cameras with APS-C sized sensors require a 10.5 mm lens to get the same effect as a 16 mm lens on a camera with full-frame sensor.[3]
posted by matrix911
Can anyone post a link of the PENTAGON VIDEO as it was released in its entirety? I assume it was posted somewhere around here but the only result when i do a SEARCH on ats is the FRAME BY FRAME still shots which some are calling VIDEO FOOTAGE... so iow, the real time footage link.
thanks
Originally posted by benoni
Wow!!
5 days since you posted these clips, and not one debunker!!
Originally posted by jthomas
Isn't debunking 9/11 Truth once good enough for you?
Google Video Link |