Complete the account of camera mechanisms.
The error by which a twin-lens reflex frames slightly differently from what it records is called ______. The view camera movement that rotates the plane of sharp focus is ______, and the one that corrects converging verticals is ______. The frame of a 6 by 6 negative measures 56 millimetres by ______ millimetres.
Word bank: parallax · tilt · rise · 56 · swing · 60
Hints
- The first blank is what a mirror in the light path abolishes.
- The last blank is what makes the format square.
Show the answer
The error by which a twin-lens reflex frames slightly differently from what it records is called parallax. The view camera movement that rotates the plane of sharp focus is tilt, and the one that corrects converging verticals is rise. The frame of a 6 by 6 negative measures 56 millimetres by 56 millimetres.
The last blank is worth noticing: the nominal name 6 × 6 refers to centimetres of a rounded roll-film width, and the real frame is 56 by 56 millimetres. Nominal format names are almost always larger than the negatives they describe, which is why they should never be used in an area calculation.
Practise Types of Camera
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