Nikon COOLPIX A900 オーナーマニュアル

A, B, C, and D Modes (Setting the Exposure for Shooting)

The sense of dynamism and amount of background defocus in subjects vary by 
changing the combinations of shutter speed and f-number even if the exposure is the 
same.

The camera can make a fast-moving subject appear static at a fast shutter speed, or 
highlight the motion of a moving subject at a slow shutter speed.

The camera can bring the subject, foreground and background into focus, or blur the 
subject’s background intentionally.

C

• The control range of the shutter speed differs depending on the zoom position, f-number, 

or ISO sensitivity setting.

• The f-number of this camera also changes depending on the zoom position.
• When zooming is performed after the exposure is set, exposure combinations or the 

f-number may be changed.

• Large apertures (expressed by small f­numbers) let more light into the camera, and small 

apertures (large f-numbers) let less light. The smallest f-number represents the largest 
aperture, and the largest f-number represents the smallest aperture.

Faster 

1/1000 s

Slower 

1/30 s

Small f-number 

(larger aperture) 

f/3.4

Large f-number 

(smaller aperture) 

f/8