His work belongs to the American Modernist tradition, though his early pieces show traces of the Pictorialist style. Schweig focused on the interplay of light and shadow to define form. He avoided the soft focus techniques popular in his youth, preferring sharp lines and clear compositions. His silver gelatin prints demonstrate a mastery of tonal range. He captured subjects with a directness that stripped away unnecessary ornamentation, focusing instead on the geometry of the frame.

Modern collectors value Schweig for his technical precision and his ability to find order in everyday scenes. His photographs of botanical subjects and architectural details fit well in contemporary interiors. These prints offer a sense of calm through their balanced compositions. Because he worked primarily in monochrome, his images maintain a neutral quality that complements various decor styles. His work provides a window into the mid-century American aesthetic without the sentimentality often found in historical photography.