Originally posted by Bruce Clark Else abandon in-camera metering and meter off a grey card or similar.
A gray card is equivalent to an incident light measurement and is often a good option when lighting is difficult.
Originally posted by johnhilvert I think you were let down using spot metering mode
Spot metering can be useful in this setting, but probably not in conjunction with any of the auto-exposure modes.* If you want use the spot metering, use it to pick a portion of the frame that you want to have a middle value (think 18% gray) and meter to that spot in manual mode. Using that exposure setting, frame as usual and take the photo. The shadows and highlights will "fall" to either side of what you picked. If you want to place exposure other than middle, adjust up or down from the spot reading. This process is essentially the same as using a hand-held meter, though with the advantage of taking the measurement through the lens.
If the dynamic range is too wide, use the camera's built-in HDR feature or do a set of bracketed exposures to be merged in post-processing.
Steve
* I cannot over-emphasize that spot metering is usually not a good choice for general shooting in any of the auto-exposure modes. Proper use is an advanced technique and requires some degree of user intervention.