Gerry Morgan wrote: > My EOS-3 (purchased in July 1999) does what Peter describes (change > aperture while DOF preview button is depressed, and watch the aperture > change). What is "program shift"?
Available on most (all?) EOS cameras in Program mode, it allows the user to change aperture/shutter speed settings while maintaining the same exposure. On the EOS-5/A2 and several of the other cameras mentioned, it's also possible to change the aperture/shutter speed combinations in DEP mode after determining the point of focus. For example, suppose that you determined settings of 1/400 sec @ f/5.6; if you wanted slightly more sharpness at the limits of the depth of field, you could "shift" the settings to 1/200 sec @ f/8 by rotating the main dial. You need to do this before the display times out and the DEP process begins again (keeping the shutter depressed halfway also works). On some cameras, such as the EOS-5/A2, the exposure will change (but the "shift" will remain) if you reframe, unless you also lock the exposure. It's easier to do than to describe; you might also want to check your camera's manual under Program Mode and DEP Mode. Jeff Conrad * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
