Analyzing an F/1.5 22.5~90mm lens The Cosmicar F/1.5 22.5~90mm super-16 television is a wonderful lens which is fabulous in low light situations. It is however a behemoth telephoto requiring an 82mm filter. Though I use a rubber hood the massive glass is subject to extreme flare at times Billowing Vapors - Mu-43 Gallery. In the attached photo slight flares are apparent. I've tried a number of hood designs and only yesterday did I arrived at a $4.49 solution. A thin PVC drainage pipe reducer fits snugly inside rubber hood extending its length from a 1.5" to 4" and increases its diameter to 100mm. Though unfielded this will certainly remedy all flare conditions I've experienced so far. As expected from a c-mount lens, the Cosmicar at 22.5mm vignetting on the sides using the 4:3 perspective, but surprisingly only about 60% at top and bottom. At 32mm the image circle reaches the image's sides, and at 45mm the image is respectable. About 65mm it relegated to the corners and from 75-90mm only a hint of vignetting exist.