The answer is very much depending on what period in time you mean. In the 19th century focus was completely different from the 18th, early 20th century was one thing, the latter part something else. So please specify what time your question is about!
Ivan Narodny has written: 'American artists' -- subject(s): American Artists, American Painters, American Painting, Painters
Italian Renaissance such as Michelangelo painters focused most on technical detail and perspective. For Baroque painters, emotion was the main focus.
American School
The Protestant disapproval of religious imagery led Dutch painters of the Baroque period to focus on idolatry.
Arthur Hoeber has written: 'The Barbizon painters' -- subject(s): Barbizon school 'Famous American women painters' -- subject(s): American Art, Women painters
the subject matter of realist painters is what they work or paint about.
focus more on shape and color than on the realistic depiction of particular objects
Portraits and scenes of ordinary life.
focus more on shape and color than the realistic depiction of particular objects (apex)
John Keese has written: 'The poets of America, illustrated by one of her painters' 'The poet's gift: illustrated by one of her painters ...' -- subject(s): American poetry 'The Poet's Gift: Illustrated by One of Her Painters'
A. Frontier Life (I'm pretty sure)
Hisako Hibi has written: 'Peaceful painter' -- subject(s): Biography, Evacuation and relocation, 1942-1945, Japanese American painters, Japanese Americans, Painters