The 0.3-2.55 density can easily be controlled by rotating the front filter ring, allowing you to slow your shutter speed or work with a wider aperture setting than normally required. By offering the ability to adjust different density values, this filter can effectively be used in a wide range of situations and controlled to meet your exposure needs.
The EF 100mm f/2.8 Macro USM Lens from Canon will focus over the full range from infinity to true life size (1:1 reproduction ratio) macro. Ideal for photographing details and small subject material, it also serves as a very sharp prime telephoto lens for portraiture and other applications. It provides a combination of versatility, image quality and superb handling.