I just bougt an FA on ebay. The metering pin is missing. So, I assume that it is on matrix metering and cannot be set to cener weighted. Is this a big deal?
The manual ought to answer most of your questions regarding the use of the FA.
I've no idea why the MCB would be missing. Tampering by a previous owner sounds possible.
In normal operation you'd push in the MCB to override “Automatic Multi-Pattern Metering.” That sets the metering to center-weighted in any of the auto exposure modes: Program, Aperture Priority, Shutter Priority. Otherwise the auto modes use AMP metering.
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