Modern Classic SLRs Series :
Nikon F2S Photomic Finder DP-2 -Part III

 

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Extreme Low-Light Metering

The Photomic finder allows you to meter a light level requiring 2- to 10-second exposure time at the maximum aperture of the lens in use. First set the shutter-speed scale at "B". Turn the shutter-speed selector while depressing the locking button in the center of the ASA film-speed dial until both signal lights glow. Read off the number on the extra-long shutter-speed scale which appears opposite the white dot.

changespeed.jpg
Then set the shutter at the indicated time using the self-timer on the camera (see the Nikon F2 or F2 Photomic instruction manual). When measurement is made in this way, the shutter speed visible in the viewfinder rests at "B" regardless of the number on the extra long shutter scale appearing opposite the white dot.

Remember that at lighting levels lower than EV 0 (e.g., 2 seconds at f/I.4 with ASA 100 film), the exposure meter takes 2 to 3 minutes to reach a steady reading.

Metering Range

If the two signal lights do not light up even after all possible lens-aperture/shutter-speed combinations have been tried, then the available light is too bright or too dim for the meter's 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 luminosity, whatever the case may be. With the 50 mm f/1.4 lens and a film speed of ASA 100, the meter's effective range extends from f/1.4 at 8 seconds to f/8 at 1/2000 second.

Unusual Lighting Situations

When there are severe brightness differences between the subject and the background, you will often obtain better results by setting up the camera so that the subject fills the central part of the viewfinder during exposure measurement. For example, if the picture includes an unusually bright source of light, such as a light bulb, move the camera to center the subject for reading, or if accessible, move in on the subject to take a close-up reading of the part you want to emphasize, and then move back until the desired composition appears in the viewfinder.

* For landscapes which include an expanse of sky, tilt the camera downward during measurement to prevent underexposure caused by the bright skylight.
** For backlighted subjects, move up close to and include dark areas of the subject in your reading.

PROPER METERING. The finder is designed to minimize the effect of light entering through the finder eyepiece under normal conditions. However, in the following situations, the use of a finder eyecup is recommended to insure complete exclusion of stray light. When the camera is in sunlight and the subject is in shade.
meterwdw1.jpg meterwdw2.jpg
<<<<<<<----- Measuring the bright area in the center of the screen will cause underexposure of the main subject.
For correct exposure, first measure the light striking the main subject, then compose and shoot.
When the stop-down method is used at small apertures.
When a shaft of sunlight falls between the eye and the eyepiece.
When the signal lights on top of the finder is used to determine exposure, the eyepiece should be covered with the hand to prevent extraneous light from entering the finder.


EXPOSURE MEASUREMENT: Special cases

Stop-Down Exposure Measurement

With the following lenses and accessories, full-aperture exposure measurement is not possible, either because the lens has no auto-diaphragm or because the diaphragm will not couple with the meter. Therefore, the stop-down method must be used.

stopdwn.jpg
This means measuring exposure with the lens aperture diaphragm stopped down to the taking aperture. First, push the coupling pin up into the Photomic finder with a coin or similar object so that the f/number 5.6 appears in the maximum aperture indicator window. Mount the lens or lens/accessory setup on the camera and switch on the meter in the usual way.

Bellows focusing attachment, extension rings and focusing unit. To determine exposure, select the desired shutter speed and stop down the lens manually until the two signal lights glow.
Preset lenses Use the same procedure as above for lenses having a preset diaphragm, such as the PC-Nikkor 35 mm f/2.8.
Auto lenses without coupling prong Some lenses, like the Zoom-Nikkor Auto 200-600 mm f/9.5, have auto diaphragms but no coupling prongs. Use the depth-of-field preview button to stop down the lens until the two signal lights glow.
Reflex-Nikkor lenses Older Reflex-Nikkor 500 mm f/8, 1000 mm f/11, 2000 mm f/11 lenses have no aperture diaphragms. Adjust the shutter speed until both signal lights glow.

Note: Since focusing may be difficult or impossible at small apertures due to image darkening on the screen, first open the lens to full aperture to focus. Then determine the correct exposure by the stop-down method.


Exposure Correction for Special Lens/Focusing-Screen Combinations

Because the light-transmitting properties of some focusing screens differ from those of ordinary screens, certain lens/screen combinations require exposure correction to compensate for the influence of the screen.
asadial2.gif
The numbers in the table on the opposite page show the exposure corrections in f/stops. With the Photomic finder, the method used is to set the film speed (ASA) against the proper compensating mark engraved on the film-speed index ring.
PDF file for OLD Lens/Screen Chart: (1 MB) -------->>>>>>>

Repro-Copying, Slide-Copying and Photo-micrography

Some exposure correction may be necessary depending on the type of film and the subject or the original slide. The numbers in the tables below show the exposure correction in f/stops. Readjust either the shutter speed or the lens diaphragm according to the indicated numbers, or reset the film speed. Three marks on the film-speed scale are equivalent to one f/stop. If the table indicates a one-stop increase with a film rated at ASA 100, reset the red arrow opposite the number 50.

Original/Type of Film

Repro/Slide Copying

B/W/Color

Letters/Figures on Light Background

Letters/Figures on Dark Background

Photomicrography

Panchromatic Film for general use

No Compensation required

+ 1-1/2 Stop

- 1/2 Stop

+ 1 Stop



Viewfinder Ready-Light

READY- LIGHT (Check the SF-1 Ready light Attachment)

readylight.jpg
The Photomic finder has a built-in ready-light for use with Nikon Speedlight units. The lamp lights up to let you know, without removing your eye from the viewfinder, when the Speedlight is fully charged and ready to fire. It goes out after the Speedlight has fired. The ready-light connects with flash such as older Nikon Speedlight SB-2 or some of those dedicated units that came with the Nikon F2 special accessory shoe.


Care, Maintenance and Handling

Your F2S Photomic Finder DP-2 is durable. However, it also deserves the same care you would give any precision instrument. Follow the simple precautions given on the opposite page and the finder will give you many years of dependable performance.

Always attach or remove the finder properly. Do not use excessive force in either case.
When not in use, store the finder with a prism guard in a case. Avoid storing it where it is liable to excessive heat, cold or dampness.
Avoid fingerprints and dust on the prism surface. Brush away grit or dust with a soft brush or use a rubber syringe. Do not use cloth or ordinary tissue. If smudges or finger marks persist, use a lens tissue sparingly dabbed with a professionally recommended lens cleaner. Wipe with a circular motion and gentle pressure. (Even an approved lens cleaner can cause damage if it seeps into the prism mount.)
When it is not being used for a long period, check the finder periodically to see that it operates properly.
Before leaving for a holiday, make a few trial exposures and allow at least two or three weeks' time for film processing and making any needed repairs or adjustment.

ACCESSORIES for Finder

In combination with the EE Aperture-Control Attachment DS-1, the F2S Photomic Finder provides the Nikon F2 camera with a shutter priority automatic exposure control in which the shutter-speed setting has priority over the aperture setting.

Finder Eyecup
eyecup.jpg
The soft rubber finder eyecup screws directly onto the finder eyepiece to Prevent extraneous light from entering the viewfinder. When using an eyepiece correction lens with a finder eyecup, it is recommended to use the Nikkormat type eyecup. First, fit the lens into the eyecup in advance. Then screw the assembly onto the finder eyepiece.


Eyepiece Correction Lenses

eyepiece.jpg
The nine eyepiece correction lenses are designed to permit nearsighted and farsighted users to view and focus without their glasses. Available in -2, -3, -4, -5, 0, +0.5, +1, +2 and +3 diopters, each representing the combined dioptre of the lens and the finder. Simply screw into the finder eyepiece.

Specifications:

Light measuring method: TTL center-weighted, full aperture measurement.
Exposure indication: Two light-emitting diodes inside viewfinder and in window atop prism housing.
Film-speed range: ASA 12-6400.
Metering range: EV
-2-17 at ASA 100 (8 sec. at f/1 .4 to 1/2000 sec. at f/8.0 with 50mm f/1.4 lens).
Aperture coupling range: f/1.2-f/32.
Shutter-speed coupling range: 1-1/2000 sec., plus B, on direct coupling; 10 to 2 sec. with manual override.
Maximum aperture setting range: f/1.2 - f/5.6.
Meter switch: Camera film-advance lever switches meter on and off.
Battery check: Provided.
Ready-light contact: Provided
Batteries: Two 1.5V silver-oxide batteries.
Weight: 270g

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Recommended links to understand more technical details related to the Nikkor F-mount and production Serial Number:
http://rick_oleson.tripod.com/index-153.html by: my friend, Rick Oleson
http://www.zi.ku.dk/personal/lhhansen/photo/fmount.htm by: Hansen, Lars Holst
http://www.mir.com.my/rb/photography/hardwares/nikonfmount/lens2.htm
http://www.photosynthesis.co.nz/nikon/serialno.html

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