Total images in all categories: 164
Total number of hits on all images: 441,258
Total number of hits on all images: 441,258
Camera Obscura on the main dome_1
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Image information
Description
The camera obscura objective is an achromatic doublet of 8" aperture and 200" focal length. The flat mirror that directs the outside view to the objective is elliptical in shape with a major axis of 17". The 8" objective focuses the view on to a 80" diameter table covering an angle of 40 degrees. The magnification if viewing the table from 20" is 10x. The camera housing can be rotated horizontally through 360 degrees via a motor driven friction drive and the view can be adjusted +/- 15 degrees from horizontal by tilting the mirror mirror manually with a control rod.
Date
Wednesday, 25 March 2015
Hits
3178
Downloads
3
Rating
No Votes
Filesize
67.40 KB (400 x 265 px)
Author
andyjss
File size of the original image
92.63 KB (640 x 425 px)
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Total images in all categories: 164
