Infrared focus
see IR setting.
Search SWPP and BPPA
Information provided by: SWPP BPPA
More Photographic Terms ...
INFRARED FOCUSING INDICATOR - A mark on the barrel of a lens that indicates proper focusing when using infrared film. The mark is typically a red or white line that is slightly apart from the focusing indicator for normal film.
Infrared focus - see IR setting.
Instamatic camera - compact camera popular in the 1960s and 70s with very simple controls, taking 126 film and yielding a 28 x28 mm negative.
Most manual focus 35mm SLR and medium format SLR lenses have a red dot, line or diamond, often with a red "R" called the infrared index mark, that can be used to achieve proper infrared focus; many autofocus lenses no longer have this mark.
infrared photos casually because you'd have to focus in two steps: turn the focus ring until the image appeared sharp in the viewfinder and then take move your eye to the top of the camera and turn the focus ring a bit so that the infrared focus mark ...
They deliver stunning sharpness and contrast even at their large maximum apertures ED lenses are in fact so highly color-corrected that the traditional infrared focusing index is not engraved on some of them.
Most lenses have a calibrated infrared focusing position on the focusing scale. This position is usually marked by a small, red dot or the letter R in red.
 See also: Infrared, Focus, Exposure, Image, Camera
  
|
RSS
