Re: A Camera's Journey.....
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One more trick if you're using a lower shutter speed is trying to predict and follow the movement of the fish as you take the photo. In other words before you click you should be following the fish, and after you click you should still be following the fish.
But yea, simply put
Higher ISO = more light, but more noise/grain Every camera is different as to how high you can raise the ISO before getting too much grain, or noise that may be unpleasant to the eye.
Low film speed = more light, but longer exposure time, so more blur for moving objects or even stationary objects unless you have a tripod. In general a film speed of 80 or more can get sharp images with a steady hand and nothing moving fast. Simply put it is frames per second. So 80 would be 1/80th of a second that the eye is open. raise it above 800 and you can get most fast objects sharp.
The bottom line is more light equals more potential control, but when dealing with live fish that may not be used to bright light, it is not always possible. However if you have the means try a light coming in from the side or both, another from the top and if you have a background that will let a little light through it, you can put one back there too. if it doesn't stress the fish you can have allot of fun with this kind of setup for pics. If not, you can still have allot of fun on a well lit day since again you have allot more room to play with the settings before things get dark. I personally love very high film speed shots at low aperature and low iso. But everyone has their own taste, and there is really no wrong way to do it.
Then there is aperture, which on auto lenses can be in camera, but on manual lenses is...well on the lens. This is simply how wide the eye of the lens is open. A lower number is more open, and gets you more light, but shallower focus or less range in focus which can result in a soft or blurred image unless you have the focus spot on. A higher number lets in less light, but gives more focal range so images are in general more sharp. Every lens is different, so some may be softer or sharper than others.
Originally Posted by John_Nicholson
