The pentax 63mm f71 wide toy lens is exactly what it sounds like an extreme wide angle prime lens that allows the photographer to capture surreal and whacky images that you might be likely to get if they were taken by a toy camera but still retaining good image quality supplied for use with pentax q series cameras this lens has also been built to retain various lens aberrations the equivalent focal length if it was to be used on a 35mm format is 35mm