Javik 0 Posted March 28, 2016 It's really hard to compare different fisheye camera products when companies outright lie about their product specifications. Vivotek FE8182 Advertising: "VIVOTEK’s FE8182 is a Recessed-Mount fisheye network camera, featuring a detailed 5-Megapixel resolution sensor with superb image quality" Reality: 15 fps @ 1920 x 1920 1920 * 1920 = 3,686,400 pixels How do you get 5 MP out of that? Oh, it's because they're using a rectangular sensor and 1.3 MP of the sensor is looking at solid black all the time outside the edges of the fisheye lens view and is useless. But hey, it's a 5 MP sensor! And actually it's not even 3.68 MP, because the fisheye is a circle, and their stated resolution is for a square sensor area. The corners of the square are also permanently looking at black, and the actual resolution is the area of a circle.. pixel radius squared times pi. 960 ^ 2 * 3.1415... = 2,895,291 So this "5MP fisheye" is actually about 2.9 megapixel usable. Share this post Link to post Share on other sites
Javik 0 Posted March 28, 2016 The ACTi E96 isn't any better. It too proclaims "The ACTi E96 5-Megapixel Vandal-Resistant Indoor Mini Dome Camera (NTSC) features a 1.19mm hemispheric fisheye fixed lens. The E96 delivers images at a resolution of 2592 x 1944." And yet this is what I can find about the actual capabilities of the E96: As a fisheye only the center circle is usable so it's actually 1944 (sensor height) divided by 2 (circle radius), squared, times pi... 1944 / 2 = 972 ^ 2 = 944784 * pi = 2,968,126 basically the same as the previous "5MP" fisheye. Share this post Link to post Share on other sites
