| 1. Battery Check Mark 2. Booster Meter Reading Window 3. Booster Lamp Window 4. Shutter Spaed Dial S. Eyepiece Shutter Knob 6. Eyepiece 7. Dioptric Adjustment Adapter 8. Attachment Stopper 9. Timer Knob 10. Film Speed Scale 11. Main Switch 12. Shutter Release Button 13. Cable Release Socket |
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14. Connecting Section of Shutter Speed Dial
15. Battery Chamber/Outside Power Socket
16. Meter Information Transmission Window
17. Viewfinder Lamp Indicator
(Indicates Metering on Camera Side)
18. Viewfinder Lamp Chamber
(For Illuminating Meter Reading Window)
* These diagrams could
be useful for repair technician, just in case someone need them.
Canon Booster T Finder
- Meter: Highly sensitive pivot meter.
- Metering element: 2 CdS photocells.
- Circuit construction: 9 transistors, 2 diodes, 3 condensers, 2 variable resistors, 3 semifixed resistors, 21 fixed resistors, 2 lamps, 1 thermistor.
- Metering system: Low illumination side (orange colored scale): Zero method stopped-down metering. Central Iy-weighted averaging system.
- High illumination side (white colored scale): Full aperture metering by camera.
- Metering range: ASA 100, EV 10 (f/22 at 1/2 sec.) -EV -3.5 (f/1.2 at 15 sec.) with booster element. ASA 100, EV 15 (f/22 at 1/60 sec.) -EV 3 (f/1.4 at 1/4 sec.) with camera element.
- Switching of metering range: By turning shutter dial and eyepiece shutter knob.
- Film speed scales: ASA 25 - 12800.
- Shutter speed scales: Low speed (orange): 60, 30, 15, 8, 4, 3sec. High speed (white): 1, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60 sec. Coupled to Booster Timer on low speed side and to shutter speed of camera on high speed side.
- Timer: Low speed: 60 - 3 seconds continuous use possible. Exposure control by electronic timing device.
- Timer lamp: Proceeding element by blinking lamp.
- Meter reading: Zero method, with illumination lamp and battery check index mark.
- Viewfinder: Eye-level using pentaprism. Dioptric adjustment lens interchangeable. Magnifier usable.
- Viewfinder information: Rangefinder, metering range.
- Meter information: When between 1/4 and 1/60 sec. at ASA 100, the camera side information appears illuminated on right side.
- Power: One 6V No. 544 silver oxide battery. Use exterior power at low temperatures. Connect battery chamber and Battery Case with Cord 6V 2B. Battery Magazine 12V is used.
- Battery checker: Built in.
- Shutter release socket: Built in.
- Eyepiece shutter: For retroincident light cutoff. Coupled to meter . switch. Booster lamp lights up when eyepiece shutter is closed.
- Attaching onto camera: Set the shutter dial of the camera at between 1/30 and 1 second and then attach onto camera. Connection is made by turning shutter speed dial on Booster side.
- Switching of shutter dial: Push the timer knob upwards at "3" second scale and turn the shutter speed dial to low speed scales. The shutter speed on the camera side is automatically set at "B", and the timer functions.
- Safety devices: Eyepiece shutter, timer knob, etc.
- Size: 87mm x 52mm x 69mm (3-5/16" x 2~1/16" x 2-11/16").
- Weight: 350 grams (12-3/8 oz).
- Accessories: Case, silver oxide battery No. 544, Battery Magazine 12V, Cord 6V 2B, Battery Case, Finder Dust Cover.
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