Frederick Kent Truslow, 75, who gave up a business career in his mid-50s to become a notable photographer of birds and wildlife, died at his home in Charlotte, N.C., Saturday of amyotrophic lateral sclerosis. The disorder is sometimes called the "Lou Gehrig disease."

Mr. Truslowwas born in Summit N.J. He was a cotton broker in New York before World War II and then joined the General Cable Corp. In 1955, when he was 53, he resigned from the firm, where he was a manager of its Perth Amboy, N.J., plant,to devote full time to photography.

He wrote and illustrated eight articles for the National Geography magazine and his photographs were used with several others. He also contributed to the Society's two-volume work on the birds of North America.

MR. Truslow's photographs appeared in the Audubon, the publication of the National Audubon Society, and in The Living Bird, the annual publication of the Cornell University Laboratory of Ornithology.

Hissubjects ranged from what he called "dickie birds" - cardinals, blue jays and other common species - to the whooping crane, the trumpeter swan, the roseate spoonbill and the wood ibis. America's only stork. He also photographed alligators in Florida, Arctic foxes in Alaska and a bull moose in Michigan.

Mr. Truslow began taking nature photographs as a boy in Summit. He lived there until 1971,when he moved to Charlotte.

Survivors include his wife, Mildred McCutcheon Truslow, of the home in Charlotte; twosons Ken, M., of Charlotte and Stuart A., of Atlanta; twobrothers. Henry, of Saco, Me., and John, of Atlanta, and two sisters, Louise Grummon, of East Jaffrey, N.H., and Martha Bourdery, of Serres, France.