>The B+W filters are considered to be the best. They have a brass ring that >will not be so sensitive to changes in temperature that can make the filter >thread expand and stick. This was more relevant when lens barrels were metal. With the use of plastics in lens barrels, particularly accessory threads, brass filter mounts are less relevant. regards, Henry Posner/B&H Photo-Video http://www.bhphotovideo.com * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
