Nikon F25B manual Features/Specifications

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FEATURES/SPECIFICATIONS

Type of camera: 35mm single-lens reflex (SLR)

Picture format: 24mm x 36mm (35mm film format)

Lens mount: Nikon F mount (bayonet type)

Lenses available : Nikkor 50mm f/l.4, f/2 or 55mm f/l.2 as standard; more than 50 Nikkor lenses in all

Shutter: Horizontal-travel focal-plane shutter; speeds of from 1 to 1/2000 second and "B"; speeds of from 2 to 10 seconds available via built-in self-timer; inter- mediate settings possible between 1/80 and 1/2000 second; shutter release via shutter button or self-timer

Flash synchronization: Automatic selection as shutter speed is set; hot-shoe contact with built-in safety switch provided; one threaded PC terminal provided for off-camera flash operation

Synchronization range: 1/2000~1 /125 sec., 1/30~1 sec. and "B" for FP bulbs; 1/30 ~1 sec. and "B" for M and MF bulbs; 1/80~ 1 sec. and "B" for electronic flash

Accessory shoe: Special Nikon-type built into body; fitted with hot-shoe contact and electric safety switch which turns on contact as flash unit is mounted

Viewfinder: Interchangeable eyelevel pentaprism type with bu ilt-in through-the-Iens (TTL) exposure meter (model DP-3); selected aperture and shutter speed in- dicated below viewfield; eyepiece shutter provided

Focusing screen: Matte Fresnel field with central split- image rangefinder surrounded by microprism ring; 12mm diameter reference circle defines area of meter center-weighting; Nikon Type K screen

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Reflex mirror: Instant-return type; lockup lever provided

Exposure metering: Through-the-Iens, center-weighted, full -aperture measurement employing two silicon photo- diodes (SPD) for fast response; exposure correctly set by adjusting for illumination of single central light- emitting diode (LED) indicator; meter cross-coupled with both diaphragm and shutter speed controls;

powered by two 1.5V silver-oxide batteries

Metering range: EV - 2 ~ EV 17 (i.e., f/l.4at 8 seconds~ f/8 at 1/2000 second) with 50mm f/l.4 lens and ASA 100

Film speed scale: Settings provided for ASA 12 ~ 6400

Lens diaphragm coupling: Bu ilt-in meter coupling pin for automatic lenses with maximum apertures of from f/1.2 to f/5 .6, meter/diaphragm coupling of from f/1.2 to f/32

Film winding: Via single-stroke lever with 1200 winding angle and 20° stand-off angle; lever also serves as meter ON/OFF switch

Frame counter : Shows number of frames exposed (ad- ditive type); automatically resets to " S" (two frames before "0") when camera back is opened

Film rewinding: Manual via film rewind crank; coupling provided on baseplate for rewind via motor drive

Depth-of-field preview: Via button provided on front of camera

Body finish : Satin-chrome and semi-gloss black

Weight: 850g (body only)

Dimensions: 152.5mm x 102mm x 66mm

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Contents Page Nomenclature Page Contents Foreword Preparation for USE Loading the Film Preparation for USE Prior to ShootingSetting the Film Speed Memo HolderSetting the Shutter Speed Operation of Camera ControlsFilm-Advance Lever Frame CounterOperation of Camera Controls Unloading Film Holding the Camera Shutter Release Operation Focusing Ou t of foc us Foc us Focusin G Depth of Field Depth-of-Field Preview ButtonDepth-of-Field Indicators Depth of FieldPage Exposure Measurement Page Exposure Measurement Page Exposure Measurement + 0 STOP-DOWN Exposure Measurement Page Exposure Compensation Adjustments Renex Exposure Compensation Adjustments Multiple Exposuresmirror Lockup Tl~ T-+ Flash SynchronizationReady -LIGHT Finder Illuminator Tips on Camera Care Page Changing the Lens Maximum Aperture Indicator 26-2.5Changing the Viewfinder Changing the Focusing Screen Changing the Focusing Screen Focusing Screen Selector Chart Accessories Lens Hoods FiltersEyepiece Correction Lenses Finder EyecupFEATURES/SPECIFICATIONS Nikon Warranty