Yashica CS 250 AF [18/33] Focusing screen

Focusing Screen

< Focusing Frame and Spot Circle >

The Focusing Screen has a Focusing Frame for auto focusing

and a Spot Circle for determining the metering range for spot

metering. In addition to this standard focusing screen, three

optional screens are available: matte screen for the Data Back,

sectioned matte screen, and horizontal split-image/microprism

collar screen. They are interchangeable depending on your

purpose.

< Manual Focusing > You can focus the lens manually on the

matte screen with the aid of the Front Mis-focus/Rear Mis-

focus Mark in the viewfinder. While looking through the

viewfinder, turn the Focusing Ring until the image on the matte

screen appears sharp. It will look blurred if the subject is not in

sharp focus.

· If you are far- or near-sighted, use FL type Diopter Lenses

(optional). Eight different lenses are available: - 5, -4, -3, -2,0,

+1, +2,and +3diopters.

Program Control Diagram

This program control diagram shows the control range of shutter speeds and apertures relative to EV values in the programmed

auto exposure mode. The program lines mark the available ranges for wide angle, normal and telephoto lenses, and these ranges

are automatically set according to the focal length of the lens used. The camera automatically chooses the optimum combination of

shutter speed and aperture within the respective program lines. However, you can also change the exposure within the range of the

same EV value by shifting the program lines by up to +3 steps. If the correct exposure that is set by the camera is F4, 1/125 sec.,

and you want to shoot with a shutter speed of 1/60 sec., for example, shift the Operating Lever to the left by 2 steps. Thus, an

exposure value of F5.6, 1/60 sec. will be displayed and you can take a correctly exposed picture with the same EV value.

· When the program is shifted, the program indicator will blink. After the picture is taken with the shifted program or after the

Main Switch is set to LOCK, the camera will automatically reset the exposure value that was set before the program was shifted.