hi, i am getting myself confused over shutter speed settings. i always hear people telling you to set your s/speed to less than 1/60s but thats not always possible in AP? or i am missing something. i dont know why i am having this crisis but its getting to me now so i had to post here and hope for good advice, as i always do mark
That is because if you are using shutter speeds slower, than camera shake becomes an issue , unless you are using a tripod. And camera shake is what causes blurry photos. You can safely use a shutter speed a bit slower if you are using a VR lens which compensates for some camera movement.
You could switch to manual mode and select a faster shutter speed, or stay in A mode and dial in some negative exposure compensation. Both of these actions will cause some underexposure but that might be preferable to the blur you are getting.
You could increase your ISO instead and get a faster shutter speed with no change to the exposure, but that will increase noise somewhat depending on how high you go.
When you have limited light available (which is what is causing your slow shutter speeds) there is always a tradeoff to be made.
In Aperture priority mode you can increase the ISO settings. You can go to Manual mode and use a shutter speed that is too low, but brightening that underexposed image will introduce noise, particularly in the darker areas of the image. You can also choose to decrease the f-stop if you aren't going below the minimum setting on the lens.
One of the easiest ways to deal with the problem if you are facing it regularly is to use ISO Auto, and set a lower limit of 100 and an upper limit of 400 (or 800, a little noisier but not too shabby). Then the camera will select an ISO that gives you a shutter speed below 1/60s provided you haven't changed that default setting (and provided there is sufficient light for a properly exposed image).