When Canon promised a fix for the EOS 5D Mark III's preview LCD leaking light, photographers wondered just what the "countermeasures" would be to prevent the display from affecting exposure readouts. The remedy, it turns out, is a simple patch -- of the physical kind, not software. Roger Cicala at LensRentals was brave enough to tear down one of the DSLRs shipping with a fix already in place and found black electrical tape covering the LCD area that would otherwise spill light into the exposure mete