What digital cameras have the largest zoom? Three new non-SLR cameras were announced in September, with 18x Optical Zooms, here they are along with their nearest rivals.The optical zoom on a camera of a type that you can easily carry around most of the time, seems like the single most important feature, since all other principal features, like megapixels, seem to have maxed out.Our task is specific. Photographing ‘architectural details on buildings in New York'. (We can't be bothered to schlep around 15 lenses, but want to capture details, without a ladder). However, a good zoom is what you really need for most photographic tasks.Three new non-SLR cameras with 18x Optical zoom, have been announced recently. They look like the ones to beat: The Panasonic DMC FZ18, Olympus SP-560 UZ and Fujifilm Finepix S8000fd.