shooting stained glass using metering mode

Here's a subject where using the metering mode
helps. As the window was surrounded by the
black area of the dark church (I cropped it off)
the camera's meter thinks it should give you an
average exposure based on both the dark area and
the light window. So the exposure will be too bright.
Choose the spot meter mode and meter on the bright
window area for a more accurate reading of the light
that you actually want to photograph.