Question about Sony Cyber-Shot DSC-F828 Digital Camera
If set the aperture on my F828 to F2.2 and raise the ISO setting from 64 to 400, will the shutter speed increase or decrease when shooting on a sunny day? Thanks Richard Cooper
Posted by Anonymous on
If you're in shutter-priority mode, yes, the shutter speed will increase. If you're in manual mode, it won't do anything until you set it manually. Just remember that, for any given exposure, shutter speed and f-stop are inversely proportional. Higher fStop, lower shutter speed. Lower f-Stop, higher shutter speed. And that the higher the f-stop, the smaller the aperture. On the F828, f2.0 is largest aperture (most light), f8 is smallest aperture (least light). ISO, on the other hand, is an approximation of film speed. In reality, however, raising the ISO just amplifies the signal downstream from the sensor - but the net effect is the same as lowering the f-stop (bigger aperture), which allows you to have a faster shutter speed for the same exposure. Hope this helps...
Posted on Sep 12, 2005
Because you are (a) opening the lens aperture to let in the maximum light and (b) making the sensor more sensitive so that it requires less light, so the camera must do what it can to counter your settings - to reduce the light by minimizing the time of the exposure. I presume this is a hypothetical question, as you don't normally want to use ISO this high with the F828 if it can be avoided.
Posted on Sep 12, 2005
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Posted on Jan 02, 2017
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