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| Drawing Camera Obscuras with Lens at the top |
| Most drawing camera obscuras project the image from a lens at the front onto a mirror which reflects it up onto the drawing surface. There are however box and tent insterments with the lens and mirror or a prisim lens at the top that directs the image down only the drawing paper. The artist would sit inside or place his head and arms into openings in the side. | ||||||||||||||
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On the left is a 6 1/2" tall, 19th century brass lens for a portable tent camera or box obscura that uses a prism lens to direct the image outside down onto a drawing board inside the tent or box. The illustration on the right shows a typical drawing tent in the landscape with a lens of this type on the top. This is an illustration from an 1889 physics book by Steele.
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