If you live or travel somewhere hot, humid, or downright moist, you may be wondering how you can prevent fungus spores from settling into your equipment. These little creatures can wind up taking residence inside of your lenses, eventually spreading and wreaking havoc within. Taking a few precautions will greatly reduce the likelihood of this occurring:
- Regularly wipe off any moisture from your camera body or lens. This is good general practice, as even “weather-sealed” cameras have been known to succumb to the elements under tough conditions. Focusing and zooming will present opportunities for the lens to breathe, allowing moisture to be sucked in. Regularly keeping your camera free from drops of moisture, especially before a lens change, dramatically reduces the risk of water coming into contact with electronic components.
- Cover your camera. There are some waterproof cases designed to keep water off of your camera and lenses. While these seem like a good idea in theory, they make it very difficult to use the camera’s buttons so they can be of limited utility. We have also tried the clear plastic bag route. While it might be fine in colder rain, in hot and humid environments the plastic will stick to your face, which can be less than comfortable.
- Carry a dry bag or waterproof cover for your bag, so you will be able to protect your gear if it starts to rain heavily.
- At the end of each day, leave your lens caps off and place your equipment in a dry bag (or sealed confined space) with some silicone gel packets. We like to use “rechargeable” ones so that we can reduce the weight of carrying them and because it’s less wasteful. These packets will help suck out any moisture that has made its way within your equipment, and will turn red when they are filled with moisture.
- If you have access to one, a dry box (sealed container with a heat source such as an incandescent bulb can serve the same purpose as the dry bag and silica packets.
- When cleaning your camera and lens, use a rocket blower if you need to blow away dust. The air in your breath could contain bacteria and fungal matter.
When moving a lens quickly from a very dry to humid environment, it may start to fog up, resulting in cloudy images. This has happened to me a few times when I keep lenses in a dry bag in my backpack all day and forget to open it. To prevent this issue, allow the lens some time to adjust to the humidity gradually, if possible (for instance, take the lens out of a dry bag and let it sit inside for while before taking it outside). If this does occur, make sure to pay special attention to removing moisture from that lens when you get a chance to dry it out.
Since fungus is happy to settle into your lens regardless of how new or expensive it is, it is a good idea to keep your gear dry when traveling to hot and humid areas. Following these steps should help prevent fungus from settling in, reducing the need for costly repairs.