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The PhotoNotes.org Dictionary of Film and Digital Photography.

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Here are all the photo dictionary entries in which the term only contains the text “rangefinder.”

Coupled rangefinder.

A type of rangefinder camera in which adjusting the rangefinder setting also adjusts the lens focus.

Entry last updated 2002-05-05.

Electronic rangefinder.

Visual indicators which appear in the viewfinder of a computerized autofocus camera when focussing a lens manually. The indicators tell you if the image is in focus (dot) or if you need to rotate the focus ring left or right (small triangle arrows) in order to achieve focus.

cf. autofocus, viewfinder.

Entry last updated 2002-04-03.

Rangefinder.

A type of focussing system or a direct vision camera which uses such a system, which is based upon principles of triangulation.

A rangefinder camera is one in which the scene in the viewfinder does not come through the taking lens. Instead, the viewfinder and taking lens have separate optical systems, linked or coupled in a complex fashion. Traditional coincident rangefinders provide a double image in the viewfinder. Adjusting focus causes the double image to merge into one when the subject is in focus. Coupled rangefinder cameras are those in which adjusting the rangefinder setting also adjusts the lens focus.

Since rangefinders do not have flip-up mirrors like SLRs they can be very quiet and since they don’t have pentaprisms they can be made more compact. The Leica M6 is probably the best known rangefinder commonly seen today, though most camera manufacturers built rangefinders in the 1960s.

cf. direct vision camera, single lens reflex (SLR), taking lens, twin-lens reflex (TLR), viewfinder.

Entry last updated 2002-05-05.


 

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