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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

A vertical plane which contains the principal point of an oblique photograph, the perspective centre of the lens and the ground nadir.  1, record 1, English, - principal%20plane

Record number: 1, Textual support number: 1 OBS

principal plane: term and definition standardized by NATO.  2, record 1, English, - principal%20plane

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Plan vertical contenant le point principal d'une photographie oblique, le centre de perspective de l'objectif photographique et le nadir.  1, record 1, French, - plan%20principal

Record number: 1, Textual support number: 1 OBS

plan principal : terme et définition normalisés par l'OTAN.  2, record 1, French, - plan%20principal

Record 1,  Textual support,  Spanish

Record number: 1, Textual support number: 1 DEF

Plano vertical que contiene: el punto principal en una fotografía oblicua, el centro de perspectiva del objetivo fotográfico y el nadir.  1, record 1, Spanish, - plano%20principal

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

The point on the ground vertically beneath the perspective centre of the camera lens. On a true vertical photograph this coincides with the principal point.  1, record 2, English, - ground%20nadir

Record number: 2, Textual support number: 1 OBS

ground nadir: term and definition standardized by NATO.  2, record 2, English, - ground%20nadir

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Point au sol à la verticale du centre de perspective de l'objectif photographique. Sur une photographie rigoureusement verticale, il se confond avec le point principal.  1, record 2, French, - nadir%20au%20sol

Record number: 2, Textual support number: 1 OBS

nadir au sol : terme et définition normalisés par l'OTAN.  2, record 2, French, - nadir%20au%20sol

Record 2,  Textual support,  Spanish

Record number: 2, Textual support number: 1 DEF

Punto sobre la superficie terrestre donde corta a ésta la vertical que pasa por el centro de perspectiva del objetivo fotográfico de la cámara. En una fotografía verdaderamente vertical coincide con el punto principal.  1, record 2, Spanish, - nadir%20terrestre

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

... image preview did not always make this lack of focus obvious. At the shortest focal length, there was moderate "pillow distortion". meaning horizontal and vertical lines were bent outward from the center of the image.  2, record 3, English, - pillow%20distortion

Record number: 3, Textual support number: 2 CONT

Unfortunately, some lenses will distort the projection, rendering it difficult to analyze. The two common types of lens distortion are pillow distortion, where the corners of the photo seem stretched out, and pincushion distortion, where the corners are compressed towards the centre. In both of these, lines that are straight in real life end up with a curve on the photograph.  3, record 3, English, - pillow%20distortion

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

[...] déformation vers le centre de l'image des droites d'un quadrillage régulier observées dans une lentille diaphragmée.  2, record 3, French, - coussinet

Record number: 3, Textual support number: 1 CONT

Un objectif peut avoir différents types de distorsions. Les plus communs sont le barillet et le coussinet. Le barillet se produit quand les bords de l'image sont bombées vers l'extérieur, donnant l'impression que l'image a été tendue sur une surface sphérique. Le coussinet est plus rare et donne l'impression inverse. Le barillet est assez commun dans les objectifs grands-angulaires et peut être particulièrement prononcé lorsque le sujet est très proche de l'objectif.  3, record 3, French, - coussinet

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

The sliding front is used to centre an object on the ground glass when the object is not directly in front of the lens. If, after setting the camera up on a tripod(when photographing a small part or making a copy of a photograph), it is found that the subject is not centered, use the sliding front to centre the subject instead of moving the tripod.  1, record 4, English, - sliding%20front

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 OBS

photogrammétrie défini par l'intersection des deux lignes joignant deux repères opposés du fond de la chambre  1, record 5, French, - centre%20de%20la%20photographie

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  French

Record 6,  Textual support,  Spanish