The pinhole camera is nice, but how can I make an image that shows more detail and appears right side up?
To achieve these improvements you must make a much bigger camera obscura in which the viewer sits inside the instrument. Such a device uses a larger lens of longer focal length and also includes a flat mirror mounted above the lens. The viewers now sit or stand inside the darkened room to see the image on a horizontal white table. Those viewers with their back to the scene of interest will see a right side up image. The smallest such instrument suitable for a single viewer might use a lens of 40 or 50-inch focal length. This device would display details in the scene 4 or 5 times larger than produced by the 10-inch instrument described above. Larger lenses with even longer focal length can reveal surprising features of very distant objects. For instance, a lens of 100 inches focal length will show an image of the full moon that is about 1 inch in diameter. Such a view is like looking at the scene with a 10 power binocular. The largest camera obscuras today use lenses of 12 to 14 inches
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- The pinhole camera is nice, but how can I make an image that shows more detail and appears right side up?
