This year’s rainy season is a very long rainy season. It is the central region where it rained so much that the rainy season will continue with the rain coming and going until next week. Therefore, it is said that it will be the longest rainy season in the history of weather observation. The humidity is very high during this rainy season.
High humidity is over 80% even during the day, but at night, as the temperature decreases, the humidity exceeds 90%, so you can spend sleepless nights in the tropical night. Air conditioning is the best way to lower the humidity on these humid days, but not all homes have air conditioning and you can’t even have it turned on all day.
There are products that are sensitive to such high humidity. It is the camera. If the lens is exposed to high humidity for an extended period of time, especially in the camera, mold may form inside the lens. I actually experienced it. I remember it as 2011, but I put the camera on the window without thinking and left it for about a week. It was rainy or cloudy every day in 2011. A week later, I looked into the camera and found a lot of stuff on it. It is not erased even if I wipe the lens. When I removed the lens, there was nothing wrong with the lens.
When I looked closely, there was mold in the body. Among DSLRs, low-end cameras use pentamirrors, not pentaprism. The penta mirror has a mirror attached to it in the pentagonal shape, but since this space is empty, there are molds all over the penta mirror. As I experienced firsthand that mold is essential for lenses and cameras that I only heard of in words, I would need a dehumidifier in the hot and humid summer. For those who use expensive lenses that cost millions of won, and DSLR or mirrorless lenses, it is recommended to purchase and use an expensive dehumidification box separately.
However, it is not easy for amateur photography hobbyists to purchase expensive dehumidifiers. So, I quickly made the dehumidification box DIY.
There is nothing to prepare. Buy a translucent plastic storage box. It doesn’t matter if there is no.
Drawer-type storage is also great. The important thing is to use a drawer or box with good sealing power. Plastic storage boxes are recommended because plastic has better sealing power than paper boxes. It is okay to empty one drawer.
However, to prepare properly, it is recommended to purchase a plastic storage box that has a rubber packing and has good sealing power.
Put the camera body and lens in the plastic compartment. Put in a foam or cushioning material called an air cap to prevent the camera body or lens from colliding. If you don’t have it, wrap it in newspaper to fully cushion it.
The important thing in the dehumidification box is a tool that removes moisture. Representatively, it is a moisture remover using silica gel and calcium chloride such as water-eating hippopotamus.
Advantages and disadvantages of silica gel
Silica gel is a porous material and can retain moisture through numerous air holes. In the open market, you can purchase various sizes of silaka gel at very low prices. Even very large sizes are inexpensive.
It turns orange when moistened, but the advantage is that it can be recycled by turning it in a microwave for about 3 minutes and drying it. However, the moisture removal power is not high. When I put it in 95% of external humidity, it drops to around 87%. It drops to the 80% range in the late 70% range. Silica gel is advantageous in that it is inexpensive and can be reused in a microwave oven or in the sun, but it does not remove moisture.
Advantages and disadvantages of water-eating hippopotamus moisture remover using calcium chloride
Calcium chloride turns into water when it retains moisture. A representative moisture remover using calcium chloride using this principle is a hippopotamus that consumes water. The moisture removal system for these water-eating hippopotamuses is not expensive. In the case of me, I bought 10 at a hypermarket for 8,000 won.
I put calcium chloride moisture remover in the storage box and measured the humidity after 3 hours.
It drops to 68%. It definitely works better. That doesn’t make a big difference. The important thing is that if the camera and lens are left unattended for a long time in weather where the humidity is more than 90%, mold may form.
The advantage of calcium chloride moisture remover is its high moisture removal rate and its disadvantage is that it is slightly more expensive than silica gel and cannot be recycled. You have to use it once and throw it away. Of course, you can buy calcium chloride separately and use that container to recycle it, or you can make it yourself using non-woven or plastic containers, but the finished product is also cheap, so it doesn’t cost a lot of money.
The plastic storage box and moisture remover cost only about 5,000 won. If you go to Daiso here, there is a temperature and hygrometer that costs 5,000 won, and you can check the humidity occasionally by putting it in. You don’t have to put in just the camera. Small appliances are also vulnerable to humidity. Products that eat electricity do not like moisture. You can wisely pass the rainy season by putting these small appliances together.
Even after the rainy season is over, on nights where tropical nights continue, the sleepless hours when the humidity exceeds 90% continues, so it is recommended to use it all summer.