I have been learning about shutter speeds and the value increments - the only problem is that i am struggling to relate the values to those displayed on the screen on my F75 can anyone explain to me what the values displayed on the screen actually mean please?
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Make sure the subject is well lit. The autofocus relies on differences in contrast to determine proper focus. Move to a well lit area or add additional light and attempt again.
Make sure the aperture ring on the lens (if that lens has one on it) is set to minimum (highest number - f22 etc.) This value it often a different color ink than the others to help speed locating it. On most Nikon & compatible lenses, when the aperture is set to minimum, the camera's main & sub command (thumb and finger) dials will control the aperture and shutter speed. When the shutter is held down 1/2 way, the aperture will open fully (to allow the most light in and speed composition) and then automatically stop down to the commanded value when fully depressed for the exposure. If you have the aperture set on the lens to something different - it may be preventing sufficent light from entering and interfere with the autofocus function.
Your problem is that your shutter speed is too low. If your concern is primarily stopping movement (hair or other) you need to increase your shutter speed or use a flash. If you don't wish to use the flash (or it is already too bright), then use the Tv mode on your camera (Shutter Priority) which controls the shutter speed.
The value will vary based on the speed of your object and the amount of light in the scene. I would suggest starting with a value of 1/250 second which will probably be sufficient to freeze most hair movement. Note that as you increase the speed, you need more light.
If everything in the picture is blurry, you are moving the camera when you press the shutter button. If only the subject is blurry and the background is clear the problem is too slow shutter speed. If this is cause by movement of the camera you must learn to SQUEESE the button while being sure you don't move the camera. It just takes a little practice. If this problem caused by a shutter speed that is too slow, it is remedied by increasing the ISO "film" speed. Even though you have no film, the camera has a "speed" setting that relates to that. The higher ISO value increases the camera's sensitivity to light and thus allows for faster shutter speed. Normally the ISO choices are 100, 200, 400, 800, 1600. Try using 400. The ISO setting is in one of your camera menus. 400 is fast enough to solve your problem in all but very fast movement of either the camera or subject. Using ISO above 400 will cause your pictures to look grainy and not as sharp. Use the highest speed only when absolutely necessary. Slower ISO numbers produce the finest grain and thus the sharpest pictures. It a trade off between ISO and shutter speed because the exposure is a combination of the ISO and shutter speed and lens opening. Each one effects the exposure by half or double.
If your camera is a Rebel XS you should have a dial on the top right with a series of letters and icons. To set your camera so you manually control the shutter speed turn this dial too "TV" (Time Value). This setting will allow you to select the shutter speed and the aperture will open or close to achieve the correct exposure. The "M" is (Manual) where you would select both the shutter speed and aperture "AV" is (Aperture Value) where the user selects the aperture they want and the shutter speed increases or decreases to obtain a proper exposure. The "P" (Program) mode allows the camera to automatically select the shutter speed and aperture
On most indoor shots the shutter speed will normally be 1/30 if you need or want it to be faster than that the only way to do that with this camera is to set the ISO to a higher value. Page 29 of your user manual explains how to set the ISO value for the camera to allow for faster shutter speeds.
Sounds like you are having some photo taking issues. There is a rule of thumb for shooting, It is the focal length must be equal to or less than the shutter speed. Example. 100 mm lens must have 1/100 of a second or faster when hand holding a camera. If your shots are too blurry or out of focus, try using faster film speed, ie. 400 asa or 800 or 1600, try using a flash if you are going to be at 1/60 a second. The faster the film you use, allows you to have a faster shutter speed. Another option is to use a tripod, and then your shutter speed is irrelevant.
use 'Program Shift'. This will change the values for both aperture &
exposure, but keep the overal exposure value correct. Eg if the standard values are 1/60th of
a second at f5.6, then rotating the dial in one direction will change the parameters (first) to
1/30th & f8, etc, and turning it in the other direction will change them to 1/125th & f4.
s I understand it from what I have seen on the Web, the 3000Z can operate in several modes:
1. Fully automatic (camera select both
2. Manual (user sets both aperture and shutter speed).
3. Aperture Priority mode - user sets aperture and camera chooses correct shutter speed to get a good exposure
Apparently there is no Shutter Priority mode (user cannot set only the shutter er speed and allow the camera to set the aperature to get a good exposure). This option is available on the Epson 850Z camera and this seems like a silly ommision to make on a "high-end" camera like the 3000Z.