Hi! I used Av mode. I used * partial metering. Did not cover the viewfinder. I will try with two different cameras... I'm puzzled.
> -----Original Message----- > > Miha Valencic wrote: ... > > Now, the confused part. Without extension tubes, I get 1/60 @ f/4. > > When I put 12, 20 or 36 mm tube on it, I still get 1/60@ f/4. > > Confusing. > > I then switched to 28-135. > > I got 1/90 @ f/4 without the tube. Notice the difference? > > 1/45 @ f/4 with 36 mm tube. > > 1/60 @ f/4 with 20 and 12 mm tube. > > I tried a similar experiment with my Elan 7E, EF 50mm f/1.8 II, and Kenko > tubes, and got the following (expected) results: > Lens alone: 1/60 f/4 > Lens + 12mm: 1/60 f/3.5 > Lens + 20mm: 1/60 f/2.8 > Lens + 36mm: 1/60 f/2.5 > Lens + 48mm: 1/60 f/2 > > So, I am worried about some aspects of your method that showed no exposure > difference where there should have been one. Further, 1/60 f/4 is a very > typical E-TTL setting for flash-only exposure. > > Consider me paranoid, but just in case: > > 1) Did you use P mode (evaluative)? > 2) Did you remember that * also activates AE lock? > 3) Did you remember to cover the viewfinder? > > * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
