Palm Warblers (Five Photographs)
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Shooting warblers can be pretty exhausting. These five photographs were taken at various ISOs from 900 to 640 because of the limited lighting. ISO makes slight changes to color as well as increasing noise. Needing higher ISOs is one of the issues with long lenses where the largest aperture is above F4. Unlike a F2.8 lens (e.g. with larger apertures), these F4 and above lenses often require higher ISOs. While that may not hurt if the shot is kept full frame, the effects of higher ISO get exaggerated when cropping. Waiting for your subject to get out of the shadows may not always be practical, shorter shutter speeds and a tripod might be more successful.