| 摘要 |
PROBLEM TO BE SOLVED: To obtain an exposure time having a satisfactory accuracy in a wide temp. range ranging from a high temp. environment to a low temp. environment by changing a correction time while depending on a temp. in the environmental condition of a temp. lower than a reference point temp. SOLUTION: A reference point temp. t0 and a temp. (t) are respectively captured from a storage device 4 and a temp. detector 5 to be compared with each other. In the case of t<t0 , the inclination K of a temp. correction curve and a shifting amountΔTL are captured from the storage device 4 and K(t-t0 )+ΔTL is calculated to be made to be an exposure time correcting valueΔT. In the case of t>t0 ,ΔTL is made to be a shutter second time correcting value. Next, DT is captured from the device 4 and the the device 4 is updated by making the DT+ΔT a new DT. The initial value of the DT is the difference (DT=Tx-Ty) between the time Tx required from a front armature lever is started until a 1st blind is driven and the time Ty required from a rear armature lever is started until a 2nd blind is driven.
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