CANONET G-III 17
Similar models: Canonet QL 17/19
Battery: 1 ea. PX13
Fig. 1 — top cover removed
Fig, 2 — bottom cover removed
Fig. 3 — front cover plates removed
Fig. 4 — front view, lens standard removed
Fig. 5 — back of lens standard
Fig. 6 — shutter separated from lens standard
Fig. 7 — old and new battery-test boards, wiring
Fig. 8 — terminal board, wiring |
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ADJUSTMENT LOCATIONS: |
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Rangefinder, horizontal |
A |
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Rangefinder, vertical |
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B |
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Meter calibration |
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C |
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Meter housing |
position |
D |
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Rangefinder |
resistor |
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E |
Diaphragm opening |
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F |
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Trapping blade |
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Q |
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Release |
over |
travel |
H |
Transport release |
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I |
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Focus |
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J |
ADJUSTMENT PROCEDURE:
3. If you make the adjustment in step #1, check to make sure the trapping blade is not in the path of the meter needle until you push the release. The curved edge of the trapping blade should align with the curve in the slot, Fig. 3. Turn the eccentric — G in Fig. 3 —so that the trapping blade clears the needle. If the camera does not have the eccentric, you may have to bend pin G, Fig. 4.
4. Make sure that the shutter
1.Hold the control end of the meter needle aligned with the f/5.6 scribe line, Fig. 3. and release the shutter at the auto setting. The diaphragm should stop down to f/5.6. To check, watch the diaphragm as you rotate the diaphragm-setting ring to the manual f/stop settings. When the diaphragm just starts to open, the f/stop calibration tells you the actual diaphragm opening. The diaphragm should start to move when you reach the f/5.6 calibration. Adjust with eccentric F, Fig. 3.
2.Hold the control end of the needle aligned with the f/5.6 scribe and note the f/stop indication through the finder. Bend the readout end of the needle to align with f/5.6 in the finder.
releases after the stepped blade engages the needle to set the aperture. Adjust with eccentric I or by changing the spacer thickness between the shutterrelease plate and the connecting lever, Fig. 3. Also adjust the release over travel (at least 0,4mm additional travel of the release button after the shutter releases) with eccentric I.
Adjust the meter accuracy with variable resistor C or by rotating the galvanometer housing after
18/SPT JOURNAL
loosening the locking screw. If you rotate the housing, check the CATS adjustment (step #6).
Proper needle readings at ASA 100. K-factor 17 5:
EV8 |
1/30 |
f/2.8 |
±1 stop |
EV11 |
1/60 |
f/5.6 |
+1 stop |
EV14 |
1/125 |
f/11 |
+-1 Stop |
6.CATS adjustment. Set auto, ASA 100, and the 2-meter focus position. Cover the CdS ceil and short between ground and the CATS contact, Fig. 1. The needle should indicate between f/5 6 and f/8. If not, rotate the meter housing or shift the position of the rangefinder-resistor band, Fig. 2.
7.Focus adjustment. Loosen the three setscrews on the outer circumference of the focus ring. Also loosen screw J, Fig 3. Set the focus ring to infinity and slide screw J for the best infinity focus.
DISASSEMBLY HIGHLIGHTS: Position of left-hand threads: shutterretaining ring in G-lll (normal thread in Now Canonet QL 17/19)
Sequence:
1.top and bottom cavers (battery cover and cover spring loose)
2.2 sections, front leatherette
3.2 front-cover plates, one on each side of lens (2 screws each)
4.unsolder red wire from batterytest board, Fig. 7
5.2 screws holding shutter-release plate to connecting lever (adjustment spacer loose)
6.4 screws, corners of lens standard
7.lift aside lens standard (viewfinder mask loose)
8.unsolder blue battery wire from terminal board
Sequence to remove shutter:
1.unsolder the five wires that come through the shutter port: —yellow from rangefinder
resistor
—white and purple from terminal board
—red from variable resistor —black from hot-shoe contact
2.free wires from wire clamps
3.rear light shield (2 screws)
4.unscrew rear lens group
5.unscrew shutter-retaining ring (left-hand thread in G-lll)
Sequence to reach switches at front of shutter:
1.front-retaining ring, identification ring, photocell mask
2.unscrew front lens group
Note: Unscrewing the complete lens cell requires a special spanner T0630-13-9246-1T. Without the special tool, you can first remove the front element. It's then possible to reach the spanner notches in the cell.
3.2 screws holding CdS cell
4.filter ring (3screws) — pass CdS cell through cutout in filter ring
5.speed-setting ring (tab on ring
passes into slot in speed cam)
6.film-speed setting ring
Note. To reach the shutter mechanism, disassemble from the back of the shutter rather than from the front.
REASSEMBLY HIGHLIGHTS:
To mount the shutter to the lens standard:
1. Seat the intermediate ring and the charge ring on the back of the shutter, Fig. 6.
2.Push the end of the shutterrelease lever as far as it will go
SPT JOURNAL/19
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