Export Custom Portrait Recipe Card
Save your calculated optical setup with exact working distance, depth-of-field bounds, shutter thresholds, and lighting guidance.
Why Working Distance Dictates Perspective Before Aperture
A common misconception in photography is that wide-angle lenses inherently distort facial features. In truth, distance alone controls perspective. When you stand 2 feet away with a 24mm lens to frame a headshot, facial features closest to the glass (the nose) appear drastically enlarged relative to the ears. By maintaining 6–10 feet (1.8–3.0m) of working distance and selecting the appropriate focal length (85mm–135mm), facial compression remains natural and flattering.
1. Both Eyes & Nose in Focus Rule
Shooting wide open at f/1.2 or f/1.4 from 6 feet produces a DoF of less than 3 cm. In a 3/4 pose, one eye will be crisp while the far eye and nose blur. Stopping down to f/2.8–f/4 ensures both pupils and the nose remain sharp.
2. Sensor Crop & Equivalent DoF
An APS-C camera requires a 56mm lens to match an 85mm full-frame angle of view. However, at f/1.8 on APS-C, the physical depth of field behaves identically to f/2.8 on full frame.
3. Bokeh Disc & Background Distance
Subject isolation is multiplied by pulling the subject away from the backdrop. A 20-foot subject-to-background gap yields 5× greater background blur than placing the subject 4 feet from a wall.