Glossary · Last updated May 3, 2026
Focus Stacking
A technique where multiple images of the same subject are shot at different focal points and combined to create one image with complete front-to-back sharpness. Essential for close-up jewelry shots where depth of field is extremely shallow.
Why focus stacking exists
At macro magnification (1:1 reproduction ratio), depth of field is brutally shallow — often under 1mm even at f/16. For a ring photographed top-down, this means the top of the band might be sharp while the prongs are soft, or vice versa. Stopping the aperture down further introduces diffraction, which softens the whole image. The way out is to take multiple shots at different focus distances and composite them — focus stacking.
How focus stacking works in practice
Stabilize the camera and product, keep the exposure and lighting controlled, and capture enough overlapping focus planes for the detail that must be shown. The number of frames, focus increments, equipment, processing method, and time vary by piece and required output. Stacking software blends selected sharp areas, but it can produce halos, doubled edges, reflection changes, or alignment errors. Compare the composite with the individual frames and physical piece rather than assuming every detail is sharp or accurate.
Where AI fits in
Modern image-to-image AI can simulate focus stacking from a single sharp-enough input by enhancing detail across the entire piece — not as physically accurate as a real stack but visually equivalent for catalog use. For sellers without a studio, a single phone macro shot through jewelry-aware AI gets ~80% of the way to a stacked output. For luxury / heirloom catalogs where pixel-level accuracy matters, real focus stacking still wins; AI is the high-volume catalog default.
See it in action
Related terms