Article ID : 00031610 / Last Modified : 01/09/2015

What is the D-Range Optimizer?

Applicable Products and Categories of This Article

The D-Range Optimizer (DRO) is a function that instantaneously analyzes the captured image data and automatically corrects for optimal exposure and tone reproduction. This helps to improve details in dark or bright areas of a picture by automatically correcting the gamma curve, exposure level, and other parameters.

IMPORTANT: If model-specific information is required regarding use, refer to the operating instructions supplied with the product. Manuals are posted on your model support page.


  • When the DRO determines that the exposure is close to optimal, the results may not appear very different. The effect may also change depending on the photographed shot or on the camera settings.
  • When DRO is used with RAW mode, the RAW data does not change, but will be optimized when developed using the specified RAW application. On the other hand, when viewing enlarged photographs shot in RAW mode on the camera LCD screen, the DRO effect will not be applied to the photographs due to system restrictions.