File:Astronomical quadrant, Museum Boerhaave Leiden.jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	19:14, 3 August 2014		3,698 × 3,346 (3.73 MB)	commons>Mike Peel	{{subst:User:Mike Peel/Template \| desc = {{en\|Astronomical quadrant. Willem Janszoon Blaeu. Amsterdam ca. 1610. 6500. Manufactured for Professor Willem Snel van Royen, betten known as Snellius (1580-1626). Was used to measure the latitude of Alkmaar an...

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Camera manufacturer	Canon
Camera model	Canon EOS 60D
Exposure time	1/8 sec (0.125)
F Number	f/5
ISO speed rating	1,600
Date and time of data generation	09:32, 1 April 2013
Lens focal length	18 mm
Image title	Astronomical quadrant. Willem Janszoon Blaeu. Amsterdam ca. 1610. 6500. Manufactured for Professor Willem Snel van Royen, betten known as Snellius (1580-1626). Was used to measure the latitude of Alkmaar and Bergen op Zoom. Using the known distance between the towns he was able to calculate the diameter of the earth. After Snellius's death the instrument was purchased by the University for its observatory. The telescope was added in 1669.
Orientation	Normal
Horizontal resolution	72 dpi
Vertical resolution	72 dpi
Software used	Aperture 3.5.1
File change date and time	09:32, 1 April 2013
Exposure Program	Manual
Exif version	2.3
Date and time of digitizing	09:32, 1 April 2013
Meaning of each component	Y Cb Cr does not exist
APEX shutter speed	3
APEX aperture	4.625
APEX exposure bias	0
Maximum land aperture	3.5635948210206 APEX (f/3.44)
Metering mode	Partial
Flash	Flash did not fire, compulsory flash suppression
DateTime subseconds	00
DateTimeOriginal subseconds	00
DateTimeDigitized subseconds	00
Supported Flashpix version	1
Color space	sRGB
Focal plane X resolution	5,728.1764705882
Focal plane Y resolution	5,808.4035087719
Focal plane resolution unit	inches
Custom image processing	Normal process
Exposure mode	Manual exposure
White balance	Auto white balance
Scene capture type	Standard
Lens used	Sigma 18-200mm f/3.5-6.3 DC OS
Serial number of camera	1581028962
Rating (out of 5)	3
IIM version	2

File:Astronomical quadrant, Museum Boerhaave Leiden.jpg

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