Camera executing strobe photographing using filters
A digital camera configured to carry out a strobe photographing is provided. The digital camera includes an imaging optical system, which forms an optical image of an object with its background, an image capturing system configured to capture the optical image of the object and the background, a color temperature sensor configured to detect a color temperature of the object and the background illuminated with external light, a white balance adjusting system configured to adjust a white balance of the image captured by the image capturing system, and a color temperature converting filter inserted in an optical path of light which passes through the imaging optical system to form the optical image when the strobe photographing is carried out. The color temperature converting filter converts the color temperature of the external light to a predetermined value.
1. A digital camera configured to carry out strobe photographing using strobe light, comprising:
an imaging optical system, which forms an optical image of an object with its background;
an image capturing system configured to capture the optical image of the object and the background;
a color temperature sensor configured to detect a color temperature of the object and the background illuminated with external light;
a white balance adjusting system configured to adjust a white balance of the image captured by the image capturing system; and
a color temperature converting filter inserted in an optical path of light which passes through the imaging optical system to form the optical image when the strobe photographing is carried out, the color temperature converting filter converting the color temperature of the external light to a predetermined value,
wherein the color temperature converting filter includes a plurality of filters, and one of the plurality of filters is selectively used based on the detected color temperature of the object and the background, and
wherein the color temperature converting filter is retracted from the optical path when the strobe photographing is not carried out, and a clear and colorless filter is inserted in the optical path when the color temperature converting filter is retracted.
2. The digital camera according to claim 1 , wherein the predetermined value is the color temperature of strobe light.
3. The digital camera according to claim 2 , wherein the predetermined external light is light of a filament lamp.
4. The digital camera according to claim 2 , wherein the predetermined external light is light of a fluorescent lamp.
5. The digital camera according to claim 1 , further comprising a distance judging system configured to judge whether the object is located within an illuminable range in which the strobe light reaches, the color temperature converting filter being retracted if the distance judging system judges that the object is out of the illuminable range.
6. The digital camera according to claim 1 , wherein the plurality of filters includes a magenta filter and a blue filter.
7. A digital camera configured to carry out a strobe photographing using strobe light, comprising:
an imaging optical system, which forms an optical image of an object with its background;
an image capturing system configured to capture the optical image of the object and the background;
a color temperature sensor configured to detect a color temperature of the object and the background illuminated with external light;
a white balance adjusting system configured to adjust a white balance of the image captured by the image capturing system;
a plurality of color temperature converting filters configured to be selectively inserted in an optical path of light which passes through the imaging optical system to form the optical image when the strobe photographing is carried out, depending on a kind of external light illuminating the object and the detected color temperature of the object and the background,
wherein one of the plurality of color temperature converting filters is selectively inserted in the optical path converting the color temperature of the external light illuminating the object and the background to a predetermined value, and
wherein the object and the background are illuminated with one of a plurality of kinds of external light having different color temperatures;
a distance judging system configured to judge whether the object is located within an illuminable range in which the strobe light reaches, the plurality of color temperature converting filters being retracted if the distance judging system judges that the object is out of the illuminable range; and
a colorless transparent filter that does not convert the color temperature, the colorless transparent filter being inserted in the optical path when none of the plurality of color temperature converting filters is inserted into the optical path.
8. The digital camera according to claim 7 , further comprising a filter switching mechanism configured to hold and selectively insert the plurality of color temperature converting filters in the optical path.
9. The digital camera according to claim 8 ,
wherein the filter switching mechanism includes:
a holder that holds the plurality of color temperature converting filters; and
a driving system that drives the holder to selectively insert the plurality of color temperature converting filters in the optical path.
10. The digital camera according to claim 9 ,
wherein the filter switching mechanism further includes a sensor system that detects a positional condition of the holder, the positional condition representing a color temperature converting filter inserted in the optical path.
11. The digital camera according to claim 9 ,
wherein the holder extends in a direction perpendicular to the optical path, the plurality of color temperature converting filters being arranged in the direction perpendicular to the optical path.
12. The digital camera according to claim 7 , wherein the plurality of filters includes a magenta filter and a blue filter.