Camera lens or body fogs up with condensation

Symptoms

• Fog or moisture visible on the outside or inside of the lens
• Viewfinder or screen appears foggy
• Moisture beads visible on the camera body
• Fogging happens after moving between temperature extremes

Likely causes

• CommonRapid temperature change from cold outdoors to warm indoorsWarm humid air condenses on the cold glass and metal surfaces.
• CommonHigh humidity environment combined with a cold cameraTropical or humid climates increase condensation risk.
• PossibleCamera bag opened immediately after a temperature changeExposing the cold camera to warm air directly speeds up fogging.
• PossibleMoisture trapped inside the lens from a previous exposureCan cause recurring internal fogging in humid conditions.
• Less commonSeal failure allowing moisture inside the lens or body over timeWould cause persistent internal fog even without dramatic temperature changes.

What to do

1. Before bringing a cold camera indoors, seal it in a camera bag or plastic bag while still outside.
2. Let the sealed camera gradually warm up to room temperature over 30–60 minutes before opening the bag.
3. Once fog appears, avoid using the camera until it's fully dry to prevent moisture getting inside.
4. Remove the battery and memory card and let everything air dry in a well-ventilated area if fogging occurred.
5. Use a silica gel packet in your camera bag to help absorb ambient moisture during transitions.
6. Avoid wiping foggy glass surfaces immediately, since this can push moisture into small gaps rather than removing it.
7. If fogging appears inside the lens elements repeatedly, even with careful temperature transitions, have the lens inspected for a seal issue.

Tools and parts

• Camera bag or resealable plastic bag
• Silica gel packets

When to call a pro

If fog appears inside the lens elements repeatedly despite careful temperature transitions, a camera repair shop can check for a seal problem and clean the internal optics.

Safety