Fuji GW670III Manual

The Fuji GW670III is a professional medium format rangefinder camera featuring a fixed 90mm f/3.5 lens, manual film advance, coupled rangefinder focusing, and 6x7cm/6x6cm format capability. This camera is known for its exceptional image quality, mechanical reliability, and straightforward operation. Below are key sections covering camera overview, operation, loading film, exposure control, maintenance, and troubleshooting.

Camera Overview

Key components: 90mm f/3.5 EBC Fujinon lens, Rangefinder/viewfinder, Film advance lever, Shutter speed dial, Aperture ring, Focus ring, Frame counter, Multiple exposure lever.

Component	Description
Lens	90mm f/3.5 EBC Fujinon with 5 elements
Viewfinder	Coupled rangefinder with bright frame lines
Shutter	Seiko leaf shutter, 1-1/500 sec + B
Film Advance	Manual lever with 135° stroke
Focus Ring	Helical focus from 1m to infinity
Aperture Ring	f/3.5 to f/22 with half-stop clicks
Shutter Release	Threaded for cable release
Frame Counter	Automatic reset when back opened
Multiple Exposure	Dedicated lever for multiple exposures
Film Back	Removable for 120/220 film compatibility

Loading Film

Proper film loading is essential for optimal performance.

1. Open camera back: Pull up rewind knob and open back.
2. Insert film: Place 120 film in left chamber, pull paper leader across to right take-up spool.
3. Align marks: Match start arrow on paper backing with mark on camera.
4. Close back: Ensure back is securely closed.
5. Advance film: Wind film advance lever until frame counter shows 1.

WARNING! Do not force film advance. Ensure paper leader is properly aligned to prevent film jams.

Basic Operation

Follow these steps for standard shooting procedure.

1. Set film speed: Adjust ISO dial according to film being used.
2. Compose image: Look through viewfinder and frame your shot.
3. Focus: Turn focus ring until rangefinder patch aligns.
4. Set exposure: Choose appropriate shutter speed and aperture.
5. Advance film: Use film advance lever after each exposure.
6. Multiple exposures: Use multiple exposure lever for creative effects.

CAUTION! Always use lens cap when not shooting to protect lens elements.

Specifications

• Format: 6x7cm (10 shots/120 film) or 6x6cm (12 shots/120 film)
• Lens: 90mm f/3.5 EBC Fujinon (5 elements in 4 groups)
• Shutter: Seiko leaf shutter, 1-1/500 sec + Bulb
• Viewfinder: Bright-frame with parallax correction marks
• Rangefinder: Coupled, base length 58mm
• Film Advance: Manual lever with 135° stroke
• Multiple Exposure: Dedicated lever system
• Weight: 1450g (with lens)
• Dimensions: 180mm x 125mm x 115mm

Exposure Control

Manual exposure control with full creative flexibility.

Shutter Speeds: 1, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60, 1/125, 1/250, 1/500 sec + B

Aperture Range: f/3.5, f/4, f/5.6, f/8, f/11, f/16, f/22 with half-stop detents

Sync Speed: All shutter speeds sync with electronic flash

Exposure Meter: No built-in meter; use external handheld meter

Focusing System

Coupled rangefinder focusing for precise image sharpness.

1. Look through viewfinder: Observe rangefinder patch in center.
2. Turn focus ring: Rotate until subject appears sharp in patch.
3. Check distance scale: Verify focus distance on lens barrel.
4. Depth of field: Use scale to determine acceptable sharpness range.

Tip: For critical focus, use rangefinder patch on high-contrast edges.

Lens Operation

The 90mm f/3.5 EBC Fujinon lens offers exceptional optical performance.

1. Aperture control: Rotate aperture ring to desired f-stop.
2. Shutter speed: Set via dial on lens barrel.
3. Cock shutter: Film advance lever also cocks shutter.
4. Filter thread: 67mm for accessory filters.
5. Lens hood: Use dedicated hood to prevent flare.
6. Close focusing: Minimum focus distance 1 meter.

WARNING! Do not touch shutter blades; they are delicate and easily damaged.

Accessories

Available accessories enhance camera functionality.

Care & Maintenance

Regular maintenance ensures long-term reliability.

Clean lens with blower brush first, then lens tissue with cleaning fluid. Store in dry environment with silica gel. Have shutter speeds checked annually by qualified technician.

CAUTION! Never force controls. If resistance is felt, stop and inspect for obstruction.

Technical Data

Manufactured by Fuji Photo Film Co., Ltd. Serial number located on camera baseplate. EBC (Electron Beam Coating) on all air-to-glass surfaces. Rangefinder effective base length: 58mm. Shutter tested to 50,000 cycles.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Film won't advance	Improper loading	Open back and reload film; ensure paper leader aligned.
Rangefinder out of alignment	Impact or wear	Have professionally calibrated by technician.
Shutter not firing	Not cocked/battery	Advance film lever fully; check battery if using meter.
Uneven frame spacing	Film transport	Ensure proper film tension during loading.
Light leaks	Worn seals	Replace light seals in film back and door.

Service: Contact authorized Fuji service center for repairs.

Support: Consult professional camera technician for maintenance.