Specs for Canon Canonet QL17 G-III

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Lense Mount: fixed lense
Lense: Canon 40mm
Filter Thread: 48mm
Minimum focusing distance: 2.6(feet), 0.8(meters)
Maximum aperature: f1.7
Minimum aperature: f16
Shutter type: In lense leaf shutter
Shutter speed range: 1/4 second to 1/500 second; Bulb
Shutter speeds: B, 1/4, 1/8/, 1/15, 1/30, 1/60, 1/125, 1/250,
1/500
Flash sync speeds: All
Flash sync via: PC terminal and standard hot shoe
Hot shoe dedication: Dedicated to Canon Canolite D speedlight
Flashmatic: yes
Flashmatic guide numbers: 28(meters), 20(meters), 14(meters)
Exposure modes: Shutter priority(marked A on the aperature
ring, this is also the mode for using Canolite D
as a dedicated flash), non-metered manual
Film speed metering range: ISO 25-ISO800
Exposure compensation: No
Battery: No longer availible, a PX625A will suffice to power meter,
though readings may be off. However, Wein offers a
substitute(limited lifespan) and there is at least one
adaptor for correcting the voltage of button cells is
availible).
Multiple Exposures: No
Film advance: Single stroke ratcheted
Rewind: Collapsible Knob
Battery Check: Yes, next to viewfinder
Tripod Mount: Metal
 
Jorge,
wonderful forum, I'm so glad I joined. I recently received the Canon GIII Q-17, curiosity compelled me to check the exposure indicator against my exposure meter, and I was baffled as to why there was such a discrepancy in readings. Now, you mention that the use of battery PX625A may cause that readings are off. Who distributes the adaptor?
Thanks
Duchan
 
ducan,

A cheaper solution is to use any sliver oxide battery plus liberal amounts of aluminium foil and set the film speed to 2/3 of a stop lower (e.g. 260 if you are using 400 speed film). I figured this out by metering off a flat wall and comparing to the reading with a mercury battery.

The voltage discharge curve for a silver oxide battery is flat like mercury, so you don't need the zener diode as you would with an alkalide battery.
 
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