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2. Crop circle - Wikipedia

   en.wikipedia.org/wiki/Crop_circle

   A crop circle, crop formation, or corn circle is a pattern created by flattening a crop, [1] usually a cereal. The term was first coined in the early 1980s. [ 2 ] Crop circles have been described as all falling "within the range of the sort of thing done in hoaxes " by Taner Edis , professor of physics at Truman State University .

3. Center-pivot irrigation - Wikipedia

   en.wikipedia.org/wiki/Center-pivot_irrigation

   A satellite image of circular fields characteristic of center pivot irrigation, Kansas Farmland with circular pivot irrigation. Center-pivot irrigation (sometimes called central pivot irrigation), also called water-wheel and circle irrigation, is a method of crop irrigation in which equipment rotates around a pivot and crops are watered with sprinklers.

4. Image sensor format - Wikipedia

   en.wikipedia.org/wiki/Image_sensor_format

   Lenses produced for 35 mm film cameras may mount well on the digital bodies, but the larger image circle of the 35 mm system lens allows unwanted light into the camera body, and the smaller size of the image sensor compared to 35 mm film format results in cropping of the image. This latter effect is known as field-of-view crop.

5. Arecibo message - Wikipedia

   en.wikipedia.org/wiki/Arecibo_message

   The "Hampshire pattern" or "Chilbolton Code formation" or "Arecibo answer" was a crop circle that appeared in 2001 near the Chilbolton radio telescope in Hampshire, UK, which echoed the visual representation and most of the information from the original Arecibo message with some significant differences including location/origin, DNA ...

6. Cropping (image) - Wikipedia

   en.wikipedia.org/wiki/Cropping_(image)

   Cropping is the removal of unwanted outer areas from a photographic or illustrated image. The process usually consists of the removal of some of the peripheral areas of an image to remove extraneous visual data from the picture, improve its framing, change the aspect ratio, or accentuate or isolate the subject matter from its background.

7. Tilt–shift photography - Wikipedia

   en.wikipedia.org/wiki/Tilt–shift_photography

   The 1961 35 mm f / 3.5 PC-Nikkor lens—the first perspective-control lens for a 35 mm camera. In photography, a perspective-control lens allows the photographer to control the appearance of perspective in the image; the lens can be moved parallel to the film or sensor, providing the equivalent of corresponding view camera movements.