Monday, 27 February 2012

Cindy says ....



"As an experiment you could:
-take a light reading (on 'P' mode)
-adjust it on  'M' then bracket 
so if the light reading was 1/125 @ f5.6
-keep the shutter speed the same and change the f number, 
-above and below the light reading.  For example:
1/250@ f5.6
1/500 @ f5.6
1/1000 @ f5.6
then the other way such as:
1/125 @ f5.6
1/60 @ f5.6
1/30 @ f5.6"

Apertures (different) all at same shutter speed 1/125

f1.4 @ 1/125




 











f5.6 @ 1/125



 f8 @ 1/125




 f11 @ 1/125



f16 @ 1/125

As the f number increases (from f1.4 to f16) 
- the aperture gets smaller 
- less light gets in the camera and 
- the image gets darker.