
Originally Posted by
Robert Amoruso
Jeffrey,
Many flight photographers use manual exposure. The reason being that as you pan with a bird, the exposure will change based on the background's tonality. The worst case example is panning from sky to ground and you are using exposure compensation based on a sky exposure. As soon as you hit the foliage, the meter says I lost light (foliage darker then sky) so increase exposure to compensate and the bird is now over exposed.
With manual, which I use, I set exposure to give me a mid-tone when metering off a 18% mid-tone. You could use a gray card but not real practical. Mid-green foliage is a mid-tone. Once you determine the mid-tone exposure, you reduce exposure (less light) for white birds about 1 to 1 1/3 stops and add light for dark birds like the RWBB which gives better detail in the blacks but you have to decide upon how much so as not to blown out the background if that is important.
What I do is have my camera set for the white bird exposure and have my finger at the right of the dial wheel (Canon) and if a dark bird flies in, I rotate the shutter speed 1 to 1 1/2 more stops of light to give him more exposure and better detail in the dark tones.