Are any of you using the 2x or 1.4x extender? What are your thoughts on this? I have the 70-200 f2.8 IS and am looking for an economical way to extend my range. If you have one, which do you have / prefer and how often do you use it?
http://www.amazon.com/Canon-EF-Extender-Telephoto-Accessory/dp/B00009XVBY/ref=sr_1_1?ie=UTF8&s=electronics&qid=1232169683&sr =8-1