Hi Miha, I'm jumping late in this one... ;-)
> So I think we've solved my puzzle. Now I know for sure (not just from > theory) that my underxposed slides are due to the nature of Evaluative > metering. As someone noted. > The problem is not the extension tube nor the evaluative metering but the nature of the shot you're doing. You're using extension tubes to get closer to your subject, right? Then your subject is filling the frame or almost, right? Then, what you're doing is using a big matrix meter for the same you would use a spot meter if you were a tad further away from your subject... and we all know that when you use a spot meter, you should compensate for the subject tonality. ++ for light subjects, -- for dark ones. Bracket when you're not sure (sometimes, even if you are ;-) ;-) . I used once extension tubes to shorten the focus of the 75-300IS to photograph some ducklings. I could fill the frame from about 1mtr ( the closest mother duck would allow me to get, (min focus distance of the 75-300IS all alone is 1.5m) ) and I used evaluative metering with good results (it's a pitty I don't have them scanned... :-( > Did not cover the viewfinder. > As Julian pointed out, I think here is the clue. When light enters from the viewfinder, the meter tends to show the highest value between this intrusive light and the light coming from the lens (thanks Canon it doesn't "ADD" them!). The pretty uniform exposure values you're getting could have been because the meter was giving you the reading of the lamp behind you and not the subject itself. It's always a very good idea to cover the viewfinder. My favorite method is using the cap of the 28-135IS, since it 'clips' on the rubber borders of the eyepiece. Removing the eyepiece to fit the plastic cover provided on the strap is only calling for trouble. The clips of the eyepiece are very fragile. Have fun with your macro shots!! (I'm just playing inversing the 28-135IS... a zoom macro lens with IS: can it get any beter?... well, I'll have to do some shoting to answer myself, since it was just few hours ago since I picked up some step-down rings to screw the lens on the adaptor that bridges the EF connection ) Regards, Gerard. * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
