A filter is a specially prepared disc of coloured gelatine, between glass, which is slipped over the camera lens. Its function #s to hold back certain rays of light and let others pass through. Although there are several kinds, I believe the beginner who has never used a filter might choose between the two most popularly used, or better yet, have both to use when necessary to improve the quality and artistic appearance of the snapshot.
One of these filters is known as the K-2. When using the K-2 filter with chrome type film, it is necessary to increase the exposure over that which you would give without the filter about 2% times. With supersensitive panchromatic film the exposure with a K-2 filter need be increased but two times.
The other filter is used largely to photograph clouds in a landscape with no increase in exposure time. This s called a sky filter, one half of which is yellow, and the other half clear. The reason why this filter can record both clouds and landscape Without requiring any increase in exposure is that" the sky is photographed through the yellow part of the filter while the landscape is photographed through the part which is not coloured. The yellow part of the filter holds back the blue of the sky somewhat and gives the white clouds more chance to record their real beauty, Your nearest dealer in photographic materials will gladly give you more information regarding the use of colour filters; and when you realize the great difference the use of a filter makes in the appearance of your snapshots you will become a confirmed user of this inexpensive accessory,
Text read from the printed page and cleaned; old type leaves the occasional error.