Does your snow photos have a grey tint or lack detail? If so, that is because built-in camera meters are calibrated to see the world as neutral gray.
When shooting photos in the snow, use The Sunny 16 Rule. This is a way to meter for correct exposure during daylight without using the camera’s meter.
In it’s simplest form, the Sunny 16 rule (or Sunny F/16 rule) states: On a bright, sunny day, the correct exposure for any middle tone subject is F/16 at the shutter speed nearest to the reciprocal of the film speed.
For example:
ISO 100 = 1/100 second @ F/16
ISO 200 = 1/200 second @ F/16
ISO 400 = 1/400 second @ F/16
ISO 800 = 1/800 second @ F/16
Simple, right?
But wait! What if it’s cloudy. Now what? The Sunny F/16 rule is actually the correct ambient exposure for an average subject under bright sunny conditions. If the sun goes behind a cloud, then the light falling onto your subject is decreased and you must make an adjustment to your basic exposure settings. Here are some aperture settings for some different daylight situations:
For more, check out this video tutorial by Brian Peterson