CHINON ZOOM LENS Specifications download pdf (Page 3)

8. Bayonet mount

9. Auto-focus contacts to camera

body

10. F stop index mark

11. In-focus LED (Green)/Battery

check lamp

12. Focusing panel

13. Battery chamber cover

14. Sound signal switch

15. Auto-focus button

16. Power switch

INTRODUCTION

Welcome to the world of CHINON photography.

Chinon has developed a new infrared auto focus system which permits stepless operation

even in total darkness.

How It Works:

An infrared Light Emitting Diode (LED) sends out an infrared beam to the subject. The

beam is then reflected back to the cameras internal infrared receiving sensor. The angle at

which the infrared reflected beam is received indicates the camera-to-subject distance via

triangulation. A micro servo motor positions the receiving sensor which in turn positions

the lens in or out to the correct setting. All this technology takes place at lightning speed,

so the lens is correctly positioned at the press of a button.

Unlike other infrared auto focus systems that select predetermined focus zones, the

CHINON AUTO-FOCUS LENS is entirely stepless between 1 m (3.3ft) and infinity (oo).

Another key feature of the Chinon Infrared System is a cancelable prefocus lock that

allows you to position the focused subject anywhere in the viewfinder. To safeguard the

infrared system from ambient infrared sunlight, the infrared beam oscillates at the

frequency of 12,500 cycles per second.

Your new Chinon 50 mm auto focus lens is perfect when shooting under adverse lighting

conditions. With the 50 mm AF you do not have to worry about the often time consuming

task of focusing.

CARE OF THE AUTO-FOCUS LENS:

Your CHINON auto-focus lens is a precision instrument. Used with care, it will provide

years of service. Protect your lens from dirt, rain, dampness, and excessive heat. Avoid

touching the lens. To clean the lens wipe it gently with a soft lintless cloth or lens tissue.

Do not use eyeglass tissues as they might damage the coating. Occasionally clean the

autofocus windows with a camel hair brush. When you are storing the lens for a long

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CHINON ZOOM LENS Specifications Page 3