This is an answer to some users, especially Nikon users, who tend to under expose 1 stop to avoid blown out highlights. If there is one thing that you cannot recover after shooting, it is the details and color in blown out areas. Cameras generally expose for mid-tones assuming the brighter and darker areas will get properly exposed. 1 stop under-exposure makes everything underexposed reducing the risk of blown highlights. Highlight Weighted Metering exposes for highlights instead of mid-tones so that highlights are properly captured. This may generally result in shadows looking darker. The ideal subject for this metering mode is large areas of snow. I generally prefer HDR and exposure bracketing to this type of metering.