Nikon Adjustment Screwdriver for DP20

Multi-Meters Finder DP-20 

The Multi-Meter Finder DP-20 is the Nikon F4(s) standard finder and highly recommend as it optimizes performance of the F4. It offers a high eyepoint of 22mm and virtually 100% picture frame coverage. Unlike any of the other eye level finder(s) designed for the previous F-models, the DP-20 multi-metered prism is a high-tech viewfinder that delivers many enhancements. In addition to the metering system selector, the following functional parts have been incorporated:

The DP-20 will revert itself as an Electronic Rangefinderin situation when the Nikon F4 is operated in Manual Focus mode. This feature will work with AF-Nikkor, Ai-type Nikkor (which includes Ai-modified Nikkor and even Non-Ai Nikkor) with a maximum aperture of f/5.6 or faster. Although most of us know how to handle manual focus on our own, the electronic rangefinder is just a focusing guide to tell you which way to focus (direction(s) in turning your focusing ring) and when the subject is sharply focus, the green in-focus symbols lights up - that is all, nothing fancy with the sexy term that it carries. However, but an advantage the F4's electronic rangefinder presents is - it works down to as low as EV-1 (single candle light source), a feat which is useful when some of you who may be struggling to focus with slow speed tele-lenses and/or specifically for people who starts to develop deteriorating eyesight syndrome (such as me). ..hehe..

Metering Pattern Selector Dial he three available metering system: Matrix, Center-Weighted and Spot metering can be easily switch back and forth via a handy selection dial located just at the top right hand side of the prism. The three symbols ,  and  represent: the spot, CW and multi-segments metering available for handling accurate ambient light measurement.

Diopter Adjustment Knob Diopter is built-in on the Nikon F4. Located just next to the metering pattern selector dial, the knob enables near-or far-sighted photographers to adjust eyepiece diopter within a continuous range of from -3 to +1. Pull the knob and rotate it to either direction until focused image appears sharp, then push back. For diopters beyond this range, Nikon eyepiece correction lenses for F3HP can be used with the F4.

Eyepiece Shutter Lever This was first used on the Nikon FA back in 1983. During self-timer operation, as the metering cells are located inside it is always recommended to use the eyepiece shutter which will prevent light from entering from the rear section which may adversely affecting the automotic exposure meter reading during self timer operation and/or shooting macro or unmanned with tripod. Simply just turn the lever to the left to close the shutter. The eye piece shutter is painted red to provide a visual reminder that it is in use.

Exposure Compensation Dial for Interchangeable Focusing Screens This feature is located in the finder, it may be neccessary to compensate the measured value when using certain interchangeable focusing screens. Compensation is possible within the range of -2 to +0.5 EV steps.

To adjust, remove the finder from the camera body and rotate the screw-like dial with the screwdriver provided, while referring to the compensation value scale window and the instruction manual for the screen concerned.

Diopter (DP)

-3

-2

-1

0

+1

Magnification

0.72

0.71

0.70

0.69

0.67

Eye Point (mm)

17.6

19.6

22

24.7

27.6

Electrical Signal Contacts:
Viewfinder display (Bottom Section)
| Full Viewfinder Display |