A wide dynamic range hardware apparatus and a photographing apparatus including the WDR hardware apparatus are provided where the WDR unit applies weight coefficients to a luminance signal of a small size image having a first exposure time and a luminance signal of a small size image having a second exposure time longer than the first exposure time. and a boiling point >200\xb0 C. The method for determining stabilization includes a signal analysis step analyzing the light output signal and a stabilization determination step determining whether the light output signal is stabilized based on an analysis result from the signal analysis step, executed by the control mechanism. To cancel the lock function, a detent is provided which can be brought between lock and movable grip part, such that the lock function can be cancelled by the detent. Each blade forms an extension of its associated apex, with each apex and its associated blade forming a generally straight line.