With your zoom set to 28 and with a 25mm tube between it and your camera I guess it's trying to focus within the front element! I tried it and for me it doesn't seem worth it. You might have more luck with the 12mm tube, but you'll still turn your zoom into a varifocal lens.
M Stewart Milton Keynes, UK ----- Original Message ----- From: Ken Durling <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, April 12, 2002 4:08 PM Subject: EOS Ext tube EF 25 on zoom > HI folks - > snip > I just got back - after 2 months - my EF 25 extension tube from > factory repair. Mounting it on my 28-135 IS, it only seems to work > when fully zoomed out to 135mm. Is this consistent with theory? * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
