Moiré is a visual distortion that can sometimes appear when scanning slides or film negatives.

It may look like wavy lines, rainbow patterns, ripples, or grid-like textures across the image.

Why Does Moiré Happen?

Moiré happens when your phone’s camera sensor interacts with fine repeating patterns in the slide, negative, or light source.

How to Reduce Moiré

You can often improve the scan by:

• Changing the scanning angle slightly
• Moving the phone a little farther away
• Using soft, even lighting
• Trying a different scanning distance

With Photomyne, adjusting the setup during scanning usually gives the best results.

Final Takeaway

Moiré is a common visual effect that can appear when scanning slides and negatives. Small adjustments to distance, angle, and lighting can often reduce or prevent it.