Tapani Tarvainen wrote: > > > "Kotsinadelis, Peter (Peter)" wrote: > > > One nice thing to consider, an extention tube gets you closer > > and with IS you can actually handhold the lens and get some nice > > macro shots without a lot of setup. And for those worried about > > AF, even with an Elan IIe and a 25mm extention tube, AF still works. > > It is likely that this is because the extension tubes don't "tell" the body > about their presence the way the extenders do, so the AF system doesn't "know" > that it's working at f/8 (at the long end). One question might be, how well does > the AF work in this situation? It doesn't. Not in any useful way, anyhow. Camera tries to focus but generally doesn't succeed. I have used that very combo and I find it usable with manual focus only. Then again autofocus isn't all that useful in macro shots anyway, and that setup is quite useful as a travel macro option -- the tube is much lighter than any macro lens as an addition to the 28-135. _____________________________________________________________________ The AF funcitons work fine my Elan IIe and EOS 3 and even my son's Rebel G. I have even used both the Canon made EF 12mm and 25mm tubes together outdoors and have had no problem. Personally I do find AF useful for macro when handholding a lens. But to each their own.... One point, for you to simply say it doesn't would mean that either my 3 cameras are exceptions to the rule or yours may need an adjustment. I think the latter is more correct. Peter K * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
