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nikon chip programming

 

Programming the Chip for Nikon

Before you start

1) Set your camera to M exposition mode.
2) Disable live preview (on some cameras). Enable AF. 

Programming includes three simple steps: 

1. Activation of the program mode 
2. Command input 
3. Data input 

Activate program mode by making 3 successive shots with the following shutter speed: 
- 1 sec 
- 5 sec 
- 1 sec 

If your camera does not have a 5 sec shutter speed, use 6 sec. 

Your screen will show aperture changing by itself in rounds: 
2.8 - 4.5 - 5.6 - 10 - 20 - 40 - 90. 

This means that the chip has entered program mode. 

Commands are input with a 1 sec. shot when a certain aperture value appears on the screen. 

You cannot choose an aperture value with a controller on your camera. You will have to wait until the needed aperture value appears on the screen. If you miss the value you need, you will have to choose it when it appears again during the next round. 

If you don't make a shot after three rounds, the chip will exit program mode automatically. To force exit simply turn your camera off. 

Changing aperture

Make one shot at aperture 2.8. Aperture will start changing in rounds, but this time from F1 to F90. Choose the value you need. You can only choose aperture values the camera displays. Make a shot at the value you need. The chip will memroize it and exit program mode. 

Changing focal length

Make a shot at aperture value 4.5. The aperture will continue changing, this time from F1 to F90. Here each value corresponds to focal length according to the table: 
 
 
 
Aper. Focal Aper. Focal Aper. Focal Aper. Focal Aper. Focal
1.0 5 mm 2.7 28 mm 6.3 68 mm 17 160 mm 40 400 mm
1.1 7 mm 2.8 30 mm 6.7 70 mm 18 180 mm 43 420 ??
1.2 8 mm 3.0 32 mm 7.1 75 mm 19 190 mm 45 450 mm
1.3 10 mm 3.2 35 mm 7.6 80 mm 20 200 mm 51 500 mm
1.4 12 mm 3.3 38 mm 8.0 85 mm 21 210 mm 54 550 mm
1.5 14 mm 3.5 40 mm 8.5 90 mm 22 220 mm 57 600 mm
1.6 15 mm 3.8 42 mm 9.0 95 mm 24 240 mm 60 650 mm
1.7 17 mm 4.0 45 mm 9.5 100 mm 25 250 mm 64 700 mm
1.8 18 mm 4.2 48 mm 10 105 mm 27 260 mm 68 800 mm
1.9 19 mm 4.5 50 mm 11 110 mm 29 270 mm 72 900 mm
2.0 20 mm 4.8 52 mm 12 120 mm 30 280 mm 76 1000 mm
2.1 21 mm 5.0 55 mm 13 130 mm 32 300 mm 81 1200 mm
2.2 22 mm 5.3 58 mm 14 135 mm 34 320 mm 85 1500 mm
2.4 24 mm 5.6 60 mm 15 140 mm 36 350 mm 90 2000 mm
2.5 25 mm 6.0 65 mm 16 150 mm 38 380 mm    

Table 1. Aperture values and corresponding focal lengths.

Make a shot when the needed aperture value appears. It will memorize its corresponding focal length and exit program mode. 

AF/MF switch

Works similar to lens switch. Simply make a shot when aperture value 5.6 appears and the focus mode will switch. The chip will then exit program mode. 

Confirmation dot justification

You can move autofocus confirmation dot slightly forward or backward by experimentally moving justification constant. One shot at aperture value 10 moves the dot back. Aperture 20 moves the dot forward. The range consists of 17 positions. On default 9 (middle position) is used. Move the confirmation dot forward or backward and try to adjust sharpness. The best justification distance is 3-5 meters. 

To exit justification mode turn your camera off. 

Lens function

If the chip is installed on a lens with an automatic instant-return aperture of AI-S type, you will have to unblock the aperture control function by setting the chip to your lens's minimal aperture value which usually equals to 16 or 22. 

For correct functioning of an instant-return aperture you will first have to set the chip to the fully-open aperture value. You can do this with the help of function 2.8. Then use the following function of minimal aperture value change. 

Make one shot at aperture value 40. Aperture will start changing its values round by round, from F1 to F90. Choose the value you need. Normally it will be 16 or 22. 

Make one shot when the aperture value you need appears. The chip will memorize it and exit program mode. 

After that you will be able to work with your aperture in the same way as with an AF lens. Close the aperture on your lens, thus setting it to its minimum. Let it stay that way forever. Then you can choose aperture value, adjust sharpness, make shots, etc, with your main dial. 

Note: In pre-AIS series lenses manufactured before 1981 the aperture control mechanism has a non-linear construction. When making pictures with such lens a slight expo correction may be needed. 

AI-S lenses with linear aperture of the new type can be distinguished by a special marking: minimal aperture value is marked in red on the main and additional scales. Additional information and photos can be found here

New AI-S series includes Samyang and Zeiss ZF lenses. 

Reset default settings

Make a shot when aperture value 90 appears. The chip will reset its default settings (45/2.8, AF, justification 9) and exit program mode. 

 

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