Editing Camera (section)

==== Twin-lens reflex camera ====
{{Main|Twin-lens reflex camera}}

[[File:Rolleiflex camera.jpg|thumb|upright|Twin-lens reflex camera]]

Twin-lens reflex cameras used a pair of nearly identical lenses: one to form the image and one as a viewfinder.<ref>{{cite web |last1=Burrows |first1=Paul |title=The rise and fall of the TLR: why the twin-lens reflex camera is a real classic |url=https://www.digitalcameraworld.com/features/the-rise-and-fall-of-tlr-cameras-why-the-twin-lens-reflex-is-a-real-classic |website=Digital Camera World |date=13 September 2021 |publisher=Future US Inc |access-date=27 December 2021 |archive-date=27 December 2021 |archive-url=https://web.archive.org/web/20211227061142/https://www.digitalcameraworld.com/features/the-rise-and-fall-of-tlr-cameras-why-the-twin-lens-reflex-is-a-real-classic |url-status=live }}</ref> The lenses were arranged with the viewing lens immediately above the taking lens. The viewing lens projects an image onto a viewing screen which can be seen from above. Some manufacturers such as Mamiya also provided a reflex head to attach to the viewing screen to allow the camera to be held to the eye when in use. The advantage of a TLR was that it could be easily focused using the viewing screen and that under most circumstances the view seen on the viewing screen was identical to that recorded on film. At close distances, however, parallax errors were encountered, and some cameras also included an indicator to show what part of the composition would be excluded.

Some TLRs had interchangeable lenses, but as these had to be paired lenses, they were relatively heavy and did not provide the range of focal lengths that the SLR could support. Most TLRs used 120 or 220 films; some used the smaller 127 films.
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