What are the white square and small hole near the viewfinder on a Fujica GW690?
Asked 10/11/2019
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On the Fujica GW690, there is a white rectangular window and a small round hole near the viewfinder. Since the camera is fully mechanical and has no light meter, what do these openings do?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
6y ago
2 Answers
18
As you can see in the image below from the service manual, the volume behind these two features is occupied by the view finder assembly.
Image source: manualslib.com
Image source: manualslib.com
The round hole is for one of the two optical paths of the range finder optics. The white rectangle is used as a light source for the frame line indications inside the view finder.
Image source: Rick Oleson
Originally by user48887. Source · Licensed CC BY-SA 4.0
user48887
6y ago
0
Generated from our catalog & community — verify before relying on it.
They’re both part of the rangefinder/viewfinder system, not a light meter.
- The small round hole is one of the rangefinder windows. A rangefinder uses two optical paths to create a split or superimposed image in the finder; when those images align, the subject is in focus.
- The white rectangular window is a frosted light window that illuminates the bright frame lines inside the viewfinder. This helps you see the composition guides, and on some rangefinders these frame lines can also shift for parallax correction as focus changes.
So in short: the hole helps focusing, and the white square helps you see the framing lines.
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