Product Description
Canon F-1 Booster T Finder
The Canon Booster T Finder, interchangeable with the F-1 pentagonal prism section, reads precise exposures with its electronic timer under extremely dim lighting conditions. It is effective for photomicrography, macrophotography, and when shooting indoors or night scenes where timed exposures are necessary.
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Technical Data
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 (orange colored scale): Zero method stopped-down metering. Centrally-weighted averaging system.
High illumination (white colored scale): Full aperture metering by camera.
Metering Range: ASA 100, EV10 (f/22 at 1/2 sec.) -EV-3.5 (f/1.2 at 15 sec.) with booster element. ASA 100, EV15 (f/22 at 1/60 sec.) -EV3 (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.
25 (32) (40) 50 (64) (80) 100 (125) (160) 200 (250) (320) 400 (500) (640) 800 (1000) (1250) 1600 (2000) (2500) 3200 (4000) (5000) 6400 (8000) (10000) 12800
Shutter Speed Scales: Low speed (orange): 60, 30, 15, 8, 4, 3 sec. High speed (white): 1, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60 sec. Coupled to Booster Timer on low speed and to shutter speed of camera on high speed.
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 pentagonal prism. Dioptric adjustment lens interchangeable. Magnifier R, S usable.
Viewfinder Information: Rangefinder, metering range.
Meter Information: When between 1/4 and 1/60 sec. at ASA 100, information of the camera appears illuminated on the right side.
Power: One 6V #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: To cut off the light entering by the viewfinder. Coupled to meter switch. Booster lamp lights up when eyepiece shutter is closed.
Attaching onto the Camera: Set the shutter dial of the camera at between 1/30 and 1 second and then attach onto the camera. The connection is made by turning the shutter speed dial on the Booster.
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 is automatically set at “B”, and the timer functions.
Safety Device: Eyepiece shutter, timer knob, etc.
Size: 87 x 52 x 69mm (3-5/16” x 2-1/16” x 2-11/16”).
Weight: 350 grams (12-3/8 ozs.).
Accessories: Case, silver oxide battery #544, Battery Magazine 12V, Cord 6V 2B, Battery Case, Finder Dust Cover.
