page_title: Secondary lens
hierarchical_section_title: Secondary lens
caption_attribution_description: English: A collage of a 180 degree fisheye secondary lens attachment for a phone camera (by itself, next to a phone with a stick-on magnetic right to attach it, and attached to the phone) along with an example fisheye image taken with the lens.
context_page_description: In photography, a secondary lens or accessory lens is a lens designed to be used in conjunction with another lens, called the primary lens.
  A secondary lens may be designed to be used either in front of the primary lens, between it and the subject, or behind the primary lens, between it and the film.
  Secondary lenses are typically simpler in mechanical design than other photographic lenses. Normally but not always there is no provision for control of focus or aperture, as these are achieved by the controls on the primary lens.
context_section_description: In photography, a secondary lens or accessory lens is a lens designed to be used in conjunction with another lens, called the primary lens.
  A secondary lens may be designed to be used either in front of the primary lens, between it and the subject, or behind the primary lens, between it and the film.
  Secondary lenses are typically simpler in mechanical design than other photographic lenses. Normally but not always there is no provision for control of focus or aperture, as these are achieved by the controls on the primary lens.
caption: A fisheye secondary lens that attaches to a phone camera using a magnetic ring, with an example image using the lens
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