File:Churchkey patent 1996550.jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	03:00, 30 September 2011		2,500 × 2,400 (1.11 MB)	commons>Materialscientist	{{Information \|Description=This is a picture I took of my grandfather's Churchkey. He likely bought this new in Milwaukee sometime in the late 30's. The US Patent #1996550 stamp can barely be seen on the front side. \|Source=[http://en.wikipedia.org/wiki/F

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Camera manufacturer	Canon
Camera model	Canon PowerShot SD630
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F Number	f/3.5
Date and time of data generation	13:41, 27 September 2011
Lens focal length	10.093 mm
Orientation	Normal
Horizontal resolution	72 dpi
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Software used	GIMP 2.4.7
File change date and time	11:59, 30 September 2011
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Exif version	2.2
Date and time of digitizing	13:41, 27 September 2011
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APEX exposure bias	0
Maximum land aperture	3.625 APEX (f/3.51)
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