Birth to 1 year: 1  In the early months, hold your baby close and read, talk and sing to her. 2  By 3-6 months of age, your baby will start to enjoy looking at mirrors and pictures of faces, shapes, colors.  By 6-12 months of age, your baby will sit in your lap, look at the pictures, touch the book, and put the book in her mouth.
From Wikipedia, the free encyclopedia. Sigma 30mm f/1.4 EX DC HSM mounted on a Canon EOS 40D, hood attached. The Sigma 30mm f/1.4 EX DC HSM is a wide-aperture photographic lens made by the Sigma Corporation, equipped with Hyper Sonic Motor (abbreviated HSM, Sigma's trade name for photo lens focusing technology using ultrasonic motor).
The Sigma 200-500 is the only 500mm lens that shoots at an aperture of f/2.8. Its 34-pound weight makes it a featherweight compared to the Leica 1600mm. The $25,000 street price and included 2x teleconverter also makes it a relative bargain. You can pick one up for Canon, Nikon and Sigma mounts.