This circular fisheye lens can be used to create circular images with an angle of view of 180. It permits creative expression through the exaggerated perspectives and unusual distortion effects. This lens is incorporated auto focus system to get accurate focusing that might be difficult through finder due to extremely large depth of field. It is useful for academic/technical applications such as solid angle measurements, because it provides a quantifiable angle/area relationship. It is widely used in science and industry for cloud cover measurements, weather observation, astronomical studies, agriculture etc. This lens is supplied with an insertion-type gelatin filter holder at the rear allowing the use gelatin filter.
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