“In Focus: Ansel Adams” is a new exhibit the J. Paul Getty Museum in Los Angeles featuring rare prints by the famed photographer.

LOS ANGELES — During the last years of his life, Ansel Adams pored over the tens of thousands of negatives he'd carefully stored since his teens, setting aside 70 he determined would stand as his greatest works of art.

Adams offered to personally print, sign and sell sets of 25 photographs from them — but with several strings attached: He would select the first 10 and let buyers choose the other 15.

But not just anybody with $30,000 to spend in 1980 could purchase the collection he called “The Museum Set Edition of Fine Prints.” They would only be sold to people Adams judged serious collectors and only after they promised never to resell them. If they left the buyer's family, they would have to go to a museum.

Among the few dozen who made the cut were the late Leonard and Marjorie Vernon, prominent Southern California collectors whose set was given to the J. Paul Getty Museum in 2011 and is now the centerpiece of “In Focus: Ansel Adams.”

Augmented by several other Adams' photos from the museum's collection, the exhibit marks the 30th anniversary of the photographer's death next month. More than that, it provides a fresh look at both Adams' genius with a camera and in the darkroom.

“What sets them off, really,” said Karen Hellman, who curated the exhibit, “is that they were created all within a span of years by Ansel Adams himself, at a time when he was printing with a particular intensity in mind.”

These were the photos the pioneer of art photography considered his best, Hellman continued, and he would take special pains in reproducing them to make sure people knew that.

“He spoke about that at the time, how later in life he wanted to create images that were more impactful,” said Hellman.

Although the collection contains several instantly recognizable images, it's safe to say even serious students of his work haven't seen photos like these.

The difference is likely best displayed in two large prints of arguably Adams' most famous work, “Moonrise, Hernandez, New Mexico.” The museum set photo printed by Adams in 1980 hangs side-by-side with one he printed in 1948.In a brief video clip accompanying the exhibition, Adams describes how he captured the image on a late November afternoon in 1941. He was returning to Santa Fe from a day of fruitlessly searching for subjects to photograph, when he caught a glimpse out of his car window of an “extraordinary” scene of the moon rising over a cemetery.“I practically ditched the car, and I had some companions with me,” he recalled. “I started yelling, you know, 'Get me the eight-by-ten, get me the tripod.”'He managed to get off exactly one shot before he lost the light from the setting sun that had been illuminating the crosses marking the cemetery's graves — and providing the element that made the photo.

This March 14, 2014 photo shows a photo exhibit entitled, “In Focus: Ansel Adams” at the J. Paul Getty Museum in Los Angeles. Toward the end of his life, photographer Ansel Adams pored over thousands of negatives he'd carefully kept since his teens and set aside 70 that he considered his best works of art. He offered to sell sets of 25, with strings attached: Adams would select 10 and let buyers choose the other 15; the images printed by Adams himself could never be resold, only left to a museum. The few dozen who made the cut included the late Leonard and Marjorie Vernon, whose collection was given to the J. Paul Getty Museum and is the centerpiece of “In Focus: Ansel Adams.”