Canon T 90 - Manual (Page 114)

• The exposure value stored into memory in
the multi-spot metering mode is cleared
under the following conditions:
3.
When more than 30 secs have elapsed
without releasing the shutter after the spot
metering button has been pressed last
When the metering mode selector is
pressed.
When the finger is removed from the shut­
ter button after exposure.
Multi-spot metering is only possible by pressing the
spot metering button unlike the one-point spot
metering. (—. p.65)
Up to eight points can be metered using the multi­
spot metering Subsequent attempts will be disre­
garded