Indian winters in the north provide a spell of foggy days, while many hill areas have a mist at certain locations through out the year. By following few guidelines, even with a basic digital camera one can take reasonably good photographs with foggy background.
If seen carefully mist and fog look magical in which everything seems to disappear in a fade. However, the close objects still appear clear. But it you take your shots only point-and-click method, photos will come out flat and dull.
The main challenge when shooting in fog or mist is the exposure. It has been observed that all light meters are designed to provide accurate exposures for middle-toned colours or gray objects. It is advisable to underexpose for fog by try +2 EV or -2 EV with subject close to the camera. Generally, there is a need for exposure compensation and fast shutter speed to get a clearer, more realistic image.
It has been seen that the longer shutter speeds give you slightly blurry images, useful if you want to create a more mysterious fog photography effect and soft images. Further, if you want to create isolated scenery with a special mood or feeling. However, if you want to add contrast to your image, you can try to include subjects that are closer to you and also a source of bright light or flash.
Another advantage of the fog photography can be used to emphasize the shape of the subject. You can easily obtain an interesting exaggerated silhouette if you take advantage of a bright fog background with the sun behind the thick fog. Again, the challenge is the exposure due to the fog background. Adjust the aperture to reduce your subject to a simple silhouette in such a situation.
Photographing in fog can be a great way to experiment with techniques that are less usual in photography but that can be a great asset for an image with a special atmospheric feel. Fog makes light rays stand out while passing through it. It can be a great idea to include them in your image, to add a special artistic effect to the final result of your fog photography.
To emphasize the light rays that enter the camera, you should try to stand slightly off angle from the light source and not directly in front of it. This perspective makes the light rays brighter which will ensure that they will stand out better.