Sony DSC-RX100 How To Use Manual page 79

By dividing the image into small areas, the product analyzes the contrast of light and shadow
between the subject and the background, and creates an image with the optimal brightness
and gradation.
1. MENU →
2. Select the desired setting using the left/right side of the control wheel.
Menu item details
D-Range Optimizer: Auto:
Corrects the brightness automatically.
D-Range Optimizer: Lv1 ― D-Range Optimizer: Lv5:
Optimizes the gradation of a recorded image for each divided area. Select the optimization
level from Lv1 (weak) to Lv5 (strong).
Note
[DRO/Auto HDR] is fixed to [Off] when the shooting mode is set to [Sweep Panorama], or
when [Multi Frame NR] or [Picture Effect] is set to other than [Off].
[DRO/Auto HDR] is fixed to [Off] when the following modes are selected in [Scene
Selection].
[Sunset]
[Night Scene]
[Night Portrait]
[Hand-held Twilight]
[Anti Motion Blur]
[Fireworks]
The setting is fixed to [D-Range Optimizer: Auto] when [Scene Selection] modes other
than the above modes are selected.
When shooting with [D-Range Opt.], the image may be noisy. Select the proper level by
checking the recorded image, especially when you enhance the effect.
[79] How to Use
Auto HDR
Widens the range (gradation) so that you can record from bright parts to dark parts with
correct brightness (HDR: High Dynamic Range). One image with proper exposure and one
overlaid image are recorded.
(Camera Settings) → [DRO/Auto HDR] → [D-Range Opt.].
Using shooting functions Correcting the brightness or contrast