Minolta X-700 User Manual download pdf (Page 46)

A blurred photograph results when movement of

the subject or camera during exposure causes a

shift in the position of the image on film.

The shutter speed required to "freeze" an

object's action normally increases as the object's

speed increases; however, no matter what the

speed, an object moving across the viewfinder field

requires a faster shutter speed than one moving at

the same speed directly toward or away from the

camera. Similarly, a moving object near the camera

(or one appearing nearer due to use of a longer-

focal-length lens or a close-up accessory) requires a

faster shutter speed than one farther away.

Blur from camera motion depends on such

factors as the lens being used, the apparent

closeness of the subject when viewed through the

lens, the shutter speed, and the camera-support

method. Since longer-focal-length lenses and close-

up accessories increase the relative size of the

subject, even a slight movement of the camera will

be magnified on film; the greater weight and size of

such lenses and accessories may also make it

difficult to hold them steady. A good rule to

follow is that the slowest shutter speed that can be

safely used by most people when hand-holding a

lens is the reciprocal of the focal length. For

example, for a 125mm lens, the speed would be

1/125 sec; for a 300mm lens, it would be 1/500

(1/300 raised to the next faster speed to be on the

safe side).

Use of a sufficiently fast shutter speed is also

important when taking pictures from a moving,

vibrating vehicle such as a boat, car, train, or plane

(especially to prevent blurring the foreground, if

any) or from a vibrating object such as a bridge. To

reduce transmission of the vibrations through your

body to the camera, relax your body and avoid

direct contact with the object as far as possible.

BLUB FBOM CAMERA/SUBJECT MOVEMENT

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Minolta X-700 User Manual Page 46