Light is everything
A coin photo is really a photo of light bouncing off metal, so the light’s angle and quality decide the result. Two small lamps at roughly 10 and 2 o’clock, raised high at a steep angle, light the design evenly while letting luster show; diffuse them with paper or a softbox if reflections look harsh.
For proofs and deeply mirrored coins, photographers use axial lighting: light aimed through a piece of glass angled at 45 degrees above the coin, so illumination arrives straight down the lens axis. It makes mirror fields read black and frosted devices glow white — the classic cameo look.
Phone camera technique
Modern phones shoot excellent coin photos with a little discipline. Stability and focus matter more than megapixels.
- Shoot straight down, with the coin flat — a slight tilt distorts the circle
- Fill most of the frame, but stay within your phone’s minimum focus distance; crop later rather than blur now
- Tap to focus on the coin’s center and lock exposure
- Brace your elbows or use a small stand; use the timer to avoid shake
- Turn off the flash — use two desk lamps instead
- Use a plain, non-reflective background: matte black or neutral gray works best
Backgrounds, color, and honesty
A cluttered or bright background steals attention and confuses exposure metering; matte black velvet or a gray card keeps color balance accurate. Set white balance off the background so silver looks silver, not blue or yellow.
If you sell coins, resist heavy editing. Sharpening a little is fine; adjusting color or contrast until problems disappear buys returns and bad feedback. The goal is a photo that looks exactly like the coin in hand.
Better photos, better AI recognition
The same habits supercharge CoinVault Pro’s scanner: even lighting, a plain background, the full coin in frame, and no glare give the Gemini AI and Coin-CLIP matching engine the detail it needs to nail the identification and grade estimate on the first try.
Photos you capture in the app live with each coin in your collection manager — a visual inventory that doubles as documentation for insurance or future sale listings.