Modern Classic SLRs Series :
Nikon EE Aperture Control Attachment Unit DS-1
for F2s Photomic w/DP-2 Prism - Instruction Manual - Part 2

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Installing the Battery

Unscrew the large milled cap on the attachment and place the accessory Ni-Cd Battery DN-1 into the battery well. Be sure that the plus (+) side faces out. If the battery is inserted in the wrong direction, the cap cannot be replaced.

Note: The battery DN-1 is supplied with the DS-1. However, even if the battery is not used, there may be some battery drain after a time lapse. Recharging will restore it to full capacity.

Checking the Battery

A built-in battery checker lets you check the condition of the battery at a glance. Turn the run control knob down until the CH mark is opposite the black dot, and watch the lamp on the top deck. If the lamp comes on with a bright light, the battery is in good condition.

Removing the Attachment

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Depress the button on the A-M switch lever so that the lever, if at the A position, springs to the M setting. Continue depressing the button and turn the lens clockwise to the limit of its travel to remove the lens from the camera. Loosen the lock knob on the attachment and then pull out the attachment.

Caution: When carrying the camera/attachment assembly around, specially with a long lens, always hold the camera body - never the attachment.

Automatic Exposure (AE) Control with Nikon F2 cameras:

A-M Switch Lever

A/M switch.jpg
The A-M switch lever sets the DS-1 for either automatic or manual exposure metering control. To set it at automatic, push the lever upward until it clicks into place with the white dot aligned with the A mark. To override it for manual control, depress the button and the lever springs back to the M setting. This stops the servo action of the attachment, and you can manually set any desired aperture on the lens aperture scale.

Automatic Metering Set the A-M switch lever at automatic and switch on the exposure meter of the finder by pulling out the camera film-advance lever. Set the desired shutter speed by turning the selector until the desired speed appears opposite the white dot. Depress the chrome button on the run-control knob on the side of the attachment; you will hear the attachment buzzing and will see one of the signal lights in the viewfinder glowing. This indicates the servo motor is working to adjust the lens diaphragm for the correct aperture.

Keep depressing the chrome button and when the proper aperture for the selected shutter speed has been obtained, the sound stops and both signal lights glow. In the viewfinder you will see the selected aperture and shutter speed. When another combination is desired, reset the shutter speed and the attachment will adjust again for the right aperture.On automatic metering control, the range of usable f/numbers is from f/16 to the maximum aperture of the lens in use. For example, with the 50 mm f/1.4 lens, the range is from f/16 to f/1.4.

The servo motor stops when the drive gear reaches either of these limits. Change the shutter speed until the servo motor starts to move. If the attachment does not move again after all shutter speeds have been tried, then the light is too bright or too dim to cover the automatic metering range. Switch to a new film that matches the available light or mount a neutral density filter onto the lens to cut down on the amount of light or use artificial lighting to increase the luminosity.

Run-Control Knob For rapid shooting with or without the motor drive and for motor-driven remote-control photography, the run-control knob locks the DS-1 attachment for continuous automatic metering.

Locked in this position, the servo motor automatically and continually changes the aperture setting with any lighting variations to insure correct exposures.

To lock the attachment for continuous metering, depress the chrome button on the run-control knob and turn the knob down until the ON mark is opposite the black dot.

Manual Override



Locked in this position, the servo motor automatically and continually changes the aperture setting with any lighting variations to insure correct exposures. To lock the attachment for continuous metering, depress the chrome button on the run-control knob and turn the knob down until the ON mark is opposite the black dot. override the automatic exposure metering for manual control, set the A-M switch lever at the M position. Now you can make your own plus or minus exposure selections for unusual subjects or lighting situations, or for creative control of the subject. Manual control also allows you to maintain a desired f number.

Recharging the Ni-Cd Battery (more info is available at this page) The Nikon Quick Charger DH-1 recharges a completely exhausted Ni-Cd Battery DN-1 to about 80% capacity in a brief three hours. It has a voltage selector for inputs of 100, 117, 220 and 240V.

Setting the Proper Voltage

First, set the voltage selector on the back of the Quick Charger to the right voltage. This is done by inserting a small coin or similar object into the slot of the voltage selector and turning it so that the red dot is opposite the correct 100, 117, 220 or 240V setting.

Charging the Battery

Unscrew the milled screw cap on the front panel and insert the Ni-Cd battery into the battery well. Be sure that the plus side faces out, otherwise the quick charger will not work. Replacing the screw cap switches on the quick charger. Plug the power cord into an AC power source. The white neon power lamp on the front panel will glow green and the red neon charge-indicator lamp goes on with a red light to indicate start of charging.

Charging time depends on the power remaining in the Ni-Cd battery, but normally a completely depleted battery will be recharged to 80% capacity in about three hours after which the charge-indicator lamp goes out. Unscrew the cap and remove the battery.

Power Sources for DS-1:
AC/DC Converter MA-4 This converter adapts the DS-1 attachment to any standard house current and supplies a constant output of 3.6V 400 mA DC. After removing the Ni-Cd battery from the attachment, connect the battery well with the 3.6V output jack on the converter with the connection cord which comes with it. Plug the power cord of the converter into an AC power source, and turn on the power switch on the converter.

AC/DC Power Supply.jpg
Before using the converter, check to see that it is working properly by pressing the run-control knob on the DS-1 attachment. If the lamp on the converter glows, then it is operating correctly.

The converter also supplies power for the Motor Drive MD-1/MD-2/MD-3 so that both the DS-1 attachment and the motor drive can be used simultaneously.
Battery Pack

The battery pack holds four 1.5V C-type batteries to power the DS-1 attachment. Its built-in voltage stabilizer insures constant light output. To connect the pack, remove the Ni-Cd battery from the attachment and connect the pack to the DS-1 attachment with the connecting cord which comes with the battery pack. Before using the battery pack, depress the run-control knob on the DS-1 attachment to make sure that the battery checker on the battery pack lights up. To conserve the batteries, do not leave the battery pack switched on when the pack is not used.

Trouble-Shooting for possible Errors: A. If either of the signal lights in the finder (or atop the finder) fails to glow after the power switch on the EE control attachment is depressed, make the following checks: 1). Pull out the film-advance lever on the camera and see if either signal light goes on. If one of them glows, this indicates that the camera batteries are still good. 2.) Verify that the attachment and the finder are properly mounted on the camera. If not, mount them properly. 3). If, after making the above checks and neither signal light glows, then the battery of the attachment needs recharging or replacement. B. If the EE control attachment fails to operate even with either signal light glowing, check to see that: 1). The A-M switch lever is set at the M position. 2). The battery of the attachment and those of the camera are still good. 3). Both the attachment and the finder are properly mounted on the camera. 4). The drive gear reaches either the maximum aperture or f/16 of the lens in use and stays there. If the drive gear stays at f/16, try faster shutter speeds; if it stays at the maximum aperture of the lens, try slower shutter speeds. If, after the above checks have been made and the attachment still fails to operate properly, consult a external experienced service center as Nikon certainly is unable to service these old devices.


Camera: Accepts only Nikon F2S Photomic
Lens: Any Nikkor Auto lens with meter coupling prong (no modification necessary)
Auto/manual selector: Provided
Meter coupling range: f/1.2 - f/16 on automatic control, f/1.2 - f/32 on manual control
Shutter speed coupling range: 10 sec. - 1/2000 sec.
Power source: Either Nikon Ni-Cd Battery DN-1, four 1.5V C-type batteries or Nikon AC/DC Converter MA-4
Battery checker: Provided
Power switch: With run-control knob
Weight: 250g (without battery)

| previous | Setup the DS-1 to use with a Nikon F2S

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Credit: Chuck Hester, US for his patience, encouragement and help to setup the various content in this site; Robert Johnson for some of his original images on the F2H-MD appeared in this site; my ex-staff, KiaSu for his superb 3-D logo appeared in this Nikon F2 site; Marc Vorgers from Holland who generously provide me with some of his images of F2AS; MCLau®, who has so much time with me to re-edit the content in this site and not to mention buying a Nikon Coolpix 990 just for this site. Keat Photo, Kuala Lumpur for providing their Nikon F2A to take some images for this site; again, Mr Edward Ngoh the great camera collector who provides us his collection of F2AS with MD-2; for their images on the Speed Magny film backs; Sean Cranor for his image on Nikon F2 25th Anniversary Model; Ted Wengelaar®, Holland for his continuous flow of input on some of the early Nikon bodies; CYLeow ® , photo editor of the Star newspaper, Malaysia for some of his images used in this site. Ms Rissa Chan, Sales manager from Shriro Malaysia who has helped to provide some of the very useful input. HiuraShinsaku®, Nikomat ML, Japan for some of his images on various F2 models; my staff, Wati, Maisa, Mai and my nephew, EEWyn®, who volunteered and helping me did so many of the film scanning works. Contributing photographers or resellers: Jen Siow, Foo KokKin, Arthur Teng, Mark Fallander, John Ishii, Ed Hassel, YoonKi Kim, Jean-Louis, M.Dugentas (Dell, Mr "Arsenall" and a few images mailed in from surfers with no appropriate reference to their origin. Dedicated to KU Yeo, just to express our mutual regrets over the outcome of a recent corporate event. Made with a PowerMac, broadcast with a Redhat Linux powered server.

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