Add to cart Model PVT-T2820: Portable Sewer/Drain Camera, 28mm or 25mm Camera Head, 20m Cable Length $981.371. Two images comparison in one screen 2. Show grid mode of nine image on the monitor 3. 25mm camera diameter with 73/140 degree wide view and 30m cable length 4. Depth of field from 5cm to 60cm 5. Adjustable spring can make 90 degree bends or “U” traps easier.