The bridge camera sector of the market is one that continues to grow and expand, despite the relative downturn in the rest of the compact camera arena.These cameras are DSLR style in shape and sometimes size, but find themselves within the compact camera area of the market because of the size of their sensor, which is generally the same as standard compact cameras. In addition, the lens is fixed rather than interchangeable.The Canon SX510 HS has been around for some time, and with the increase in competition from Sony, Panasonic and Samsung, it's not surprising to see Canon introducing new models in this sector.In terms of its zoom range, although 42x is long, by some standards, it's actually fairly modest. As it stands, 62x optical zoom is the current market leader. However, with a 24mm wide angle lens, that gives you an impressive reach of 1008mm at the telephoto end of the optic. Canon has also included its ZoomPlus technology for this camera, which is its type of digital zoom.