He shoots black-and-white film and prints his pictures, by his own hand, on a scale (11 x 14 and 16 x 20 inches) that, these days, is conspicuous in its modesty.The intimate size matters. It matches the tenderness of his approach toward his subjects, mostly fellow residents of Brooklyn. Wagner practices a quiet, lyrical kind of humanism that comes straight out of the traditions of mid-20th-century street photography and the social documentary photo-essay. "Tell It Like It Is," his show at L.A.'s Papillion, is invigorating.