put the camera into manual.
Use the wheel on the back to set one setting.
Use the spin dial behind the release for the other setting.
How do I change the shutter speed to 1/125 and set the aperture at f/16 combined on the Canon EOS 400D?
Apparently you need to READ %26amp; STUDY the Owner's Manual for your camera. Its the only way to learn to use your camera effectively.
These books might also help you:
%26quot;Hands-On Digital Photography%26quot; by George Schaub
%26quot;How Digital Photography Works: 2nd. Edition%26quot; by Ron White
How do I change the shutter speed to 1/125 and set the aperture at f/16 combined on the Canon EOS 400D?
you can only do that in manual mode
TV= shutter priority
AV= aperture priority
M gives you complete control over shutter/aperture