Sony DSLR-A900 User Guide

• The exposure is compensated by 1/3 of a step between ±3.0 EV. You can 

set this exposure step to 1/2 EV increments with [Exposure step] in the 

 Recording menu (page 111).

To compensate the exposure only on the ambient light*
In the default setting, the exposure compensation is performed with the 
amount of flash light also changed when the flash is fired. You can limit the 
effect of exposure compensation to the background that is illuminated only 
by ambient light (light other than the flash) (page 121).
* Ambient light: Any light other than the flash light that shines on the scene 

for an extended period of time, such as natural light, a light bulb, or a 
fluorescent light.

You can fix the exposure before deciding on the composition when taking a 
picture. This is effective when the metering object and focusing object are 
different, or when you want to shoot continuously while keeping the same 
exposure value.

Adjust the exposure with b/B on 
the multi-selector.

• You can use the front or rear control 

dial instead.

Standard exposure

Shooting with fixed brightness (AE Lock)

• Adjust the focus (you do not need to lock the focus.)