The hood attaches to the front of the lens and provides a shield against any bright light reaching the camera from the side. If this light strikes the front element of the lens it can create flare in the image. Strong flare shows as a streak across the image, but flare can also create a general loss of contrast over the whole image.
Filters offer EOS owners the opportunity to add effects to your images. The most useful is the polarising filter which can darken a blue sky on a bright sunny day while leaving the rest of the scene unchanged. However, this only happens when the sun is at right-angles to the filter – so very good for any part of the horizon when the sun is overhead.
A UV (ultraviolet) filter is also useful on lenses for EOS cameras. UV radiation is not visible to the human eye, but can create haziness in photographic images. UV radiation increases with altitude, so it’s a good filter to have if you enjoy climbing. A UV filter is also popular to protect the front of a lens. It is a lot less expensive to replace a filter than a front element if scratched.
Enter the Gallery
Now you understand why light plays such an important part in photography at this time of year, it is time to get out and put your knowledge into practice. So take your camera out and capture images; the next Gallery will be selected based on the interesting use of light. Choose your favourites and enter them in the Gallery. Next month your photo could be displayed as one of the best!