tunalegs
Pretended Artist
what is this 'repeater window' that you speak of? Is there one on the nikon fm or ft3?
A meter readout/needle/etc. visible on the outside of the camera body rather than through the viewfinder.
For clarification: a coupled meter is a meter which is coupled to the shutter dial and to the lens' f stop. When you change the shutter speed or the lens' f stop, you change the meter setting as well because they are coupled together.
An uncoupled meter isn't connected to the shutter or f-stop in any way. You simply get the values from the meter and manually transfer them to the shutter and lens.
Either system can have a meter readout inside or outside of the viewfinder. A "repeater" has them both inside and outside.