Among the 125 works by photographer and environmentalist Ansel Adams on view at the Corcoran is this self-portrait.

Ansel Adams was one of the first photographers to use a camera to foster respect for the environment and promote conservation. We have the late William H. and Saundra B. Lane of Massachusetts to thank for collecting the 125 black-and-white Adams photographs on view in “Ansel Adams” September 15 to January 27, 2008. Admission is $14 for adults, $12 for seniors and military, $10 for students; tickets for exhibits and discussions are available at corcoran.org or ticketmaster.com.

Filmmaker Ric Burns, whose credits include Ansel Adams: A Documentary Film, will speak about the photographer September 20 at 7; admission is $30. Milton Esterow, editor and publisher of ARTnews, discusses “The Art Market” September 17 at 7; $20.

Through mid-October, included in the price of a ticket to “Ansel Adams” is a voucher good for admission to “Annie Leibovitz: A Photographer’s Life, 1990–2005” October 13 to January 13, 2008. That’s two exhibits for the price of one, plus the Corcoran’s permanent collection. 500 17th St., NW; 202-639-1700; corcoran.org.