B. Anthony Stewart photographed for National Geographic for 42 years. His career spanned the development of color photography and was a pioneer in using the view camera and 35mm equipment. His specialty was the geographic scene. i.e., pictures of foreign countries that portrayed the land the way people lived. A native of Lynch Station, Va., Mr. Stewart had planned a career in business. He joined National Geographic in 1927 as secretary to the chief of the photography laboratory. By 1931 he had decided to pursue photography and joined the staff of the magazine.