In situations where it is difficult, dangerous or even impossible to get close, Century's 2x teleconverters are the ideal solution. Easily mounted between your camera and your lens, they double the focal length of your lens, allowing you to fill the frame with the action at a distance. The XF-212B model fits most 1/2" bayonet mount lenses (Panasonic and JVC), the XF-2325 is for the Sony 1/2" bayonet mount and the XF-223B is for 2/3" bayonet mount lenses. With a 2x teleconverter, subjects that were previously out of reach will now fill the frame. Shoot across a stadium or over water. Easily attached, the 2x instantly converts a 9-144mm 16:1 zoom into an 18-288mm super telephoto zoom. However, a word of caution: doubling the focal length results in a two-stop reduction in the amount of light reaching the focal plane. Characterised by their shallow depth of field, they also facilitate the isolation of a subject from the foreground and background. For example, wildlife videographers find this useful when filming an animal whose natural camouflage causes it to blend into its surroundings. The reduced depth of field is also effective for shooting through visual obstacles, such as wire mesh fences.