![]() Here, we learn about the two types of fisheye lens effects and how your camera sensor size and focal length affect your fisheye image. They can capture photos with a 180-degree range, which lets you achieve photos with a greatly distorted periphery. As far as we have been told, however, Apple has no plans to produce such an upgrade, and is leaving this in the hands of third party developers such as RealViz and VR Toolbox.Fisheye lenses are specialized lenses characterised by their ability to capture an overwhelmingly wider range than wide-angle lenses. THAT would be an upgrade we'd probably all be willing to pay for. Now a QTVRAS upgrade that could stitch fisheye images AND create cubic VR movies. It produced far more stitching artifacts, and its blending algorithms left something to be desired, requiring significantly more post-production retouching in Photoshop. The original PhotoVista software could accept fisheye images (before their settlement with iPIX rendered it inoperable with fisheyes), but the PhotoVista stitcher was never quite as good as that of QTVRAS. Unfortunately, there are none that I'm aware of today. The bottom line is that full frame fisheyes (such as the 16mm) would be great to use for panoramic VR photography *IF* there were good stitchers that could handle the fisheye formats. ![]() To be honest, very few people actually care about the math above, and most eyes glaze over when you go into much detail about it (mine included). It is a foundation element of most iPIX digital capture kits. Many photographers yield quite acceptable results with it. It does produce a circular image within the Coolpix frame, with a field of view between 184 and 186 degrees. As a supplemental lens adapter, it is far more limited in its optical quality, and any flaws or aberrations are magnified by the even smaller image sensors used in most Coolpix cameras. ![]() the FC-E8 Fisheye Converter made by Nikon for its Coolpix line of digital cameras is often mistakenly referred to as an "8mm fisheye." It is not, but it produces a similar rendering on the Coolpix cameras to an 8mm true fisheye on a 35mm camera. The resulting image is a cropped circle with 180-degree vertical coverage and 114-degree horizontal coverage (assuming portrait orientation). However, when this lens is used on a D1x with its smaller image sensor, the 23mm image circle is cropped on the short dimension to 15.6mm, yielding a fov of about 114 degrees. (Note that the actual focal length of most Nikkor 8mm fisheyes is about 8.2mm.) Thus, the circular field of view inside a 35mm film frame is about 178-180 degrees. The diameter of the image circle on an 8mm Nikkor fisheye (focused at infinity) is approximately 23mm. ![]() The smaller sensors of digital cameras such as the D1 series crops part of the image circle, so it is no longer a true fisheye when used in this format. Note however that these 8mm lenses are designed to be true fisheyes for the 35mm camera format. A true fisheye projects the full image circle of the lens within the frame of the camera, so you wind up with a circular image inside a dark field, rather than having the frame filled with the image. The difference is that the 8mm lenses are true fisheyes, rather than full-frame fisheyes like the 16mm. The same formula can be used with the 8mm fisheye lenses.
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