Modern Classic SLRs Series :
Nikon Interchangeable Prisms for F2 Series bodies - Part VI

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Remember that at lighting levels lower than EV 0 (e.g., 2 seconds at f/I.4 with ASA 100 film), the exposure meter may take 2 to 3 minutes to reach a steady reading. This is much due to the Cds cell (Cadmium Sulfide) that was employed in the DP-2 finder which was known to respond slower in very dim light. If the reading changes slowly, you have to wait for it to stabilize and thus in very dimly lit condition, this may takes quite a while. Another drawback is, it also require a slight delay to adjust itself to sudden change of light intensity (Such as from a very bright area to low light level or vice versa); this would cause meter reading "blinds" for a while which we often referred it as "memory residue ".

Another significant capability of the F2S w/DP-2 finder is, it can use a new accessory called "EE Aperture-Control Attachment Unit". As you may also notice, the right hand side of the finder comes with a ledge with a few electrical contacts which was used for mounting the EE Unit.

Note: The DS-1 works off its own internal battery (the DN-1 NiCd charged with the DH-1 charger).

What is an EE aperture Control Attachment unit ? It is a Nikon designed add-on accessory to the Nikon camera body (With/Without Motor Drive) use in combination with either a F2S/F2SB Photomic Finder (DS-1/DS-2) bodies or DS-12 for Nikon F2AS bodies combinations and instantly transformed a mechanical Nikon F2 camera with automatic exposure-metering control. The "auto" mode is shutter priority based. Once a shutter speed is selected, the meter in the F2 Photomic Finder(s) reads the scene brightness and commands the attachment to drive the lens aperture diaphragm to the correct aperture corresponding to the selected shutter speed. The automatic exposure metering control is coupled with all shutter speeds on the shutter-speed dial of the respective Photomic Finder and accepts, without factory modification, all lenses with a meter coupling prong. The EE Aperture-Control Attachment Unit will, indirectly converts the all mechanical F2 camera to a shutter-priority automation because the unit, when mounted between the camera and lens, can be used to drive the aperture to any preset value. It was a very clever design but may require regular maintenance, and the power source too has its limitation in usage and needs frequent recharging.

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The Metered window diaplay on the top of the camera.

The original version was called DS-1 but was replaced with an upgrade called DS-2. Both units are identical except those smart engineers at Nikon have forgotten there was a PC terminal on the F2 and once the DS-1 was mounted, it covers the PC socket as well. DS-2 fixes that flaw.

What significant do these accessory means to Nikon F2 ? Because you can convert the mechanical F2 to an automatic SLR with such a device attached, it is just like imagining the evergreen classic mechanical Nikon FM2n converted into a shutter priority AE camera, how exciting, huh ?

<<<<<<<------ Riot demonstration in Singapore. Pictured by: CYLeow ® Photo Editor of the Star newspaper. Hosted by: Malaysian Internet Resources Copyright © Singapore Press Holdings

IF you are wondering WHY there wasn't a "DS-11" for Nikon F2A, it is because the EE Unit cannot work with Photomic Finder DP-1 and DP-11 due to the lack of electrical contacts at the side to accept any of the EE Units.

| Instruction Manual for EE Aperture Control Attachment Unit DS-1, DS-2, DS-11 & DS-12 | | Main Reference Map for EE Aperture Control Attachment Unit DS-1, DS-2, DS-11 & DS-12 |

The differences between DS-1 and DS-2 are almost none except the DS-2has an additional PC terminal to patch a slight designing flaw where earlier DS-1 where once mounted, the F2 was unable to make use of the sync for flash photography and the DS-1 make use of the F2's accessory shoe to mount the unit while the secondary PC terminal has also been covered up by the unit.

Basically, you cannot use flash with a DS-1 attached. The DS-2 patched this designing flaw with an connected PC terminal just next to the "A / M" (Auto/Manual Switch just like those found on many of the AF Nikon bodies).

| Previous | Next | 6/17 Other Nikon Metered Prisms DP-3, DP-11 and DP-12
| Back | Main Index Page - Interchangeable Viewfinders

System Accessories: Motor Drives / Prisms / Screens / Macro / Film Backs / Flash Other Accessories: DS-1 / DS-2 / DS-12 / eyepiece / DH-1 / cases / Cable releases / Miscellaneous
| History & Background | Semi-FAQ | Various Features and Functions - 6 Parts |

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Dedicated Lenses for Nikon F3AF: AF 80mm f/2.8 | AF 200mm f/3.5 EDIF
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Others: Noct Nikkor | OP-Nikkor | UV Nikkor 55mm 105mm | Focusing Units | Bellows-Nikkor 105mm 135mm
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Tele-Converters: TC-1 | TC-2 | TC-200 | TC-201 | TC-300 | TC-301 | TC-14 | TC-14A | TC-14B | TC-14C | TC-14E | TC-16 | TC-16A | TC-20E


Nikon F
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Recommended links to understand more technical details related to the Nikkor F-mount and production Serial Number: by: my friend, Rick Oleson by: Hansen, Lars Holst

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In memory of my friend Com. Augusto Staut, Brazil, 1971-2000.

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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