On Mon, 16 May 2005 08:42:39 -0600 Francis Zhou <[EMAIL PROTECTED]> writes: > I apologize if this is a "beat to death" question. I only take occasional > close up shots. I am not ready to buy a proper macro lens and intend to use > either Canon 500D close up filter or EF25 II extension tube on my 70-200/2.8 > (non-IS). All I need is a quick summary of pros and cons or a pointer to a > link with such information.
If you use an extension tube on a zoom lens, then zooming will change focus and the subject-to-lens distance. If you use a diopter (500D) on a zoom lens, zooming will (mostly) retain focus and will change magnification. I prefer the diopter on a zoom lens. Dave Herzstein [EMAIL PROTECTED] http://pixseal.com * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
