| 摘要 |
PROBLEM TO BE SOLVED: To improve the accuracy of correcting finder entering counter-light (light entering from finder) quantity in TTL photometry by estimating and arithmetically calculating a finder entering counter-light component in a mirror-down state by substituting the photometric value of the finder entering counter-light in a mirror-up state for a functional equation logically derived or an actual measurement value table under various conditions, and subtracting the estimated value from the photometric value in the mirror-down state. SOLUTION: This camera is provided with a control means performing 1st photometric operation S2 for measuring lens incident light and the finer entering counter-light in such a state that a photographing optical path and a finder optical path are connected (mirror-down state), 2nd photometric operation S4 for measuring the finder entering counter-light in such a state that the photographing optical path and the finder optical path are intercepted (mirror-up state), and arithmetic operation S6 for arithmetically calculating the estimated value of the finder entering counter-light in the connected state according to the measured result by the 2nd photometric operation and also arithmetically calculating the estimated value of the lens incident light in the connected state according to the calculated result of the counter-light and the measured result by the 1st photometric operation. |
