Protect your lens from humidity. Excess humidity can be destructive to cameras and lenses. Fungus that forms between lens elements and on glass surfaces in humid dark environments is either practically impossible or extremely expensive to remove.
The Dri+Cap system helps to maintain equipment at the proper RH (relative humidity) levels. Optimal RH is between 35% and 45% for storing camera equipment. The Dri+Cap absorbs moisture that can otherwise turn into mould, protecting sensitive camera equipment from ambient RH fluctuations, particularly relevant when travelling in climates with heavy temperature changes.
Each Dri+Cap has a compartment which holds a sachet of dehumidifier (dessicant). Four sachets are provided in the kit and extra sachets are available separately. Simply insert a fresh sachet into the cap compartment. Screw the compartment lid on to seal the cap – a rubber ‘O’ ring ensures an air-tight seal. Now install the cap; the rubber ‘O’ ring ensures an airtight seal against the mount flange on either the lens or camera body. Be sure to check the dehumidifier sachet at regular intervals. When the indicator gels have turned from orange to green, replace the sachet with a fresh one.
For all EOS cameras and EF/EF-S lenses.