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Message: <blockquote data-quote="Horoscope Fish" data-source="post: 425629" data-attributes="member: 13090">[USER=16844]@Lawrence[/USER] is correct here regarding how Auto ISO works.Program Mode is fine when your shooting conditions are perfect, or near perfect, but not for something like moon shots. That kind of contrast-y shot is going to require YOUR brain being in control, not the camera's because the camera's brain will rely on the meter and the meter's job is NOT to nail perfect exposure; the job of the meter is expose your shots based on middle grey. Start thinking of your meter as a "Medium Grey Meter" because in practice, that's what it is. Under ideal shooting conditions we GET perfect exposure so frequently we start thinking the meter is failing when we get anything less than perfect exposure but that's our fault, not the meter's. The job of the light meter is to give us a consistent baseline of exposure from which we calculate the correct exposure for the shot. The key word there is "consistent"; the meter wants (and will, if you let it) expose EVERY shot the exact same way: by exposing for middle grey. If this wasn't the case, we'd constantly be in a tug-of-war with our light meters. Instead, the light meter does one thing and one thing only and we manipulate the camera settings based on knowing the meter is exposing for middle grey. If we want that snow to look white, or the moon to look something other than middle grey, we have to adjust our exposure to match what we want out of that particular shot. The meter doesn't know what we want out of any particular shot (since every shot will be different) but it does give us a baseline to help get the exposure we want.Just remember: The light meter wants to expose for middle grey... Every. Single. Time......</blockquote>

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