Equipment: Canon 30D, Sigma 10-20mm F4.0-5.6 EX DC HSM, B+W CPL filter
Location: Yuen Long, New Territories, Kowloon
Date: 26 Nov, 2006
The bases of mid-level clouds typically appear between 6,500 to 20,000 feet (2,000 to 6,000 meters). Because of their lower altitudes, they are composed primarily of water droplets, however, they can also be composed of ice crystals when temperatures are cold enough.
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