When presented with clear blue skies, I often avoid having significant sky coverage in my frame. But sometimes, blue is beautiful.
With a bright, evenly-colored background, the top of the mountains being hit by the morning sunlight creates a strong, eye-catching line. The strong contrast of the mountain shadow creates a second strong line. Take a great scene and reflect it to get symmetry with the result often being greater than twice as good as the image without a reflection.
The choice of focal length is always very important for composing an image. In this case, the twin peaks of the Maroon Bells were of primary interest to me. A focal length that makes these peaks large in the frame will best emphasize their over 14,000' size. I captured many frames using longer focal lengths, but I also liked seeing the bigger picture. With a mirror-calm water surface large enough to reflect the entire scene, I took advantage of the wider angle focal lengths available in the Canon EF 16-35mm f/4L IS USM Lens on this morning.
When not to use a circular polarizer filter: at sunrise or sunset, with a wide angle focal length being used and large amounts of blue sky in the frame, it is unlikely that I have a CPL filter mounted on my lens. A CPL filter used with a low sun angle and lots of evenly-toned blue sky in the frame is a perfect recipe for very uneven darkening of the sky, a look that is generally not appreciated.
This is a complicated HDR image based on three differently-exposed source images. Removed from this image was a line of other like-minded photographers.