The purpose of high speed cameras cameras cannot be changed. Some of them have a ring at the end of the target thread to attach filters and lens approach, however, due to its diameter, it is difficult to find compatible accessories. And these are usually sold by the same manufacturer separately. Other manufacturers, in order to improve or alter its optical capabilities, offer the possibility of incorporating an adapter ring, on which it is possible to incorporate accessories such as filters, zoom lenses.
Manufacturers like Nikon and Panasonic have reduced their supply of high-end bridge cameras, preferring to focus on low ranges of their SLR cameras. Moreover, in recent years there is a new category of digital cameras, intermediate between the long-zoom compact and SLR: cameras without interchangeable lens mirror.
Bridge cameras have a reflex mirror viewfinder and some manufacturers have incorporated a sensor APS-C, allowing a signal to noise ratio, which directly influences a better image quality.