Optical wedge sheets

Find in the tables below the optical wedge sheets which are to be associated with your lenses in test.

Distances and ratios are given for guidance purposes. They correspond to technical standards based on user experience while remaining as close as possible to the laws of optics adapted to camera tests. They can therefore be modified by the user depending on his needs and habits.

We provide a blank optical wedge sheet for you to download.

Optical Wedge Sheet Prêt À Tourner

You can choose between 2 possibilities of optical tests:

  • Copy our suggestions of ratio and distance between the film plane and the Prêt À Tourner chart on the optical wedge sheets. This method is recommended in most cases.
  • For tests requiring mathematical accuracy, you can refer to our optical wedge sheets Test Tips and apply the exact distance between the film plane and the Prêt À Tourner chart, that is to say 50 times the focal length.
LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
10 mm40,82'6''
12 mm40,82'6''
14 mm40,82'6''
16 mm30,82'6''
20 mm20,82'6''
24 mm213'
32 mm213'
40 mm11,55'
50 mm126'6''
85 mm126'6''
100 mm1310'
135 mm1310'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
10 mm20,82'6''
12 mm30,82'6''
14 mm20,82'6''
18 mm10,82'6''
25 mm113'
35 mm11,63'
50 mm11,55'6''
50 mm126'6''
85 mm126'6''

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
8 mm80,62'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
9,5 mm40,62'
12 mm30,82'6''
16 mm20,82'6''
25 mm113'
35 mm11,24'
50 mm11,55'
85 mm126'6''

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
14 mm30,62'
16 mm30,62'
20 mm20,82'6''
24 mm113'
28 mm11,24'
32 mm11,24'
40 mm11,55'
50 mm126'6''
65 mm126'6''
85 mm126,6"
100 mm12,48'
135 mm12,48'
180 mm12,48'

12,48'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
16 mm80,82'6"
18 mm713''
21 mm413'
25 mm41,24'
27 mm21,24'
32 mm11,55'
35 mm11,55'
40 mm11,86'
50 mm126'6"
75 mm12,48'
100 mm12,48'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
28 mm11,44'6"
35 mm11,75'6''
40 mm11,86'
50 mm126'6"
60 mm12,48'
75 mm12,79'
100 mm1310'
135 mm13,612'
180 mm14,515'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
24 mm213'
29 mm21,24'
35 mm11,24'
50 mm126'6"
85 mm126'6"

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
11 mm51,55'
16 mm41,55'
25 mm31,55'
35 mm21,55'
50 mm21,55'
80 mm11,55'
110 mm11,55'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
16 mm81,24'
18 mm71,24'
20 mm71,24'
22 mm61,24'
24 mm51,24'
26 mm51,24'
28 mm41,24'
30 mm31,24'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
45 mm51,86'
60 mm31,86'
70 mm21,86'
90 mm21,86'
120 & more11,86'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
18 mm51,13'6"
25 mm31,13'6"
30 mm21,13'6"
35 mm & more11,13'6"

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
21 mm13'
25 mm1,13'6"
29 mm1,24'
35 mm1,55'
50 mm126'6"
85 mm12,48'
100 mm12,48'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
100 mm12,48'
135 mm12,48"

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
29 mm31,55'
35 mm31,55'
40 mm31,55'
45 mm21,55'
50 mm21,55'
55 mm21,55'
60 mm21,55'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
55 mm21,86'
65 mm21,86'
75 mm21,86'
85 mm11,86'
95 mm11,86'
105 mm11,86'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
15 mm50,82'6"
18 mm13'
21 mm13'
25 mm1,13'6"
29 mm1,24'
35 mm1,55'
50 mm126'6"
85 mm12,48'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
14,5 mm50,82'6''
17,5 mm513'
21 mm513'
27 mm31,24'
35 mm31,24'
40 mm21,55'
50 mm21,86'
75 mm12,48'
100 mm12,48'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
14,5 mm20,82'6''
17,5 mm20,82'6''
21 mm213'
27 mm11,24'
35 mm11,55'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
50 mm11,86'
100 mm11,86'
200 mm12,48

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
24 mm51,13'6"
28 mm51,13'6"
30 mm51,24'
35 mm51,24'
40 mm41,55'
50 mm31,86'
75 mm21,86'
100 mm12,17'
150 mm12,48'
180 mm1310'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
14,5 mm51,24'
17,5 mm41,24'
20 mm31,24'
24 mm31,24'
27 mm21,24'
32 mm21,24'
35 mm21,24'
45 mm11,24'
50 mm11,24'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
17,5 mm313'
21 mm213'
24 mm213'
29 mm213'
32 mm113'
34 mm113'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
27 mm41,24'
35 mm31,24'
40 mm21,24'
45 mm21,24'
50 mm11,24'
60 mm & more11,24'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
19 mm41,55'
21 mm41,55'
24 mm31,55'
27 mm31,55'
30 mm21,55'
35 mm21,55'
40 mm21,55'
50 mm21,55'
65 mm11,55'
90 mm11,55'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
24 mm51,86'
29 mm51,86'
35 mm31,86'
45 mm31,86'
60 mm21,86'
85 mm21,86'
120 mm21,86'
130 mm21,86'
180 mm11,86'
250 mm11,86'
275 mm11,86'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
60 mm11,86'
65 mm11,86'
70 mm11,86'
80 mm11,86'
85 mm11,86'
95 mm11,86'
105 mm11,86'
115 mm11,86'
125 mm11,86'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
16 mm10,82'6''
18 mm113'
21 mm113'
25 mm11,24'
29 mm11,24'
35 mm11,44'6"
40 mm11,55'
50 mm11,86'
65 mm11,86'
75 mm12,48'
100 mm12,48'
135 mm12,48'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
15 mm10,82'6''
18 mm113'
21 mm113'
25 mm11,24'
29 mm11,24'
35 mm11,44'6"
40 mm11,55'
50 mm11,86'
75 mm12,48'
100 mm12,48'
135 mm12,48'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
15 mm41,24'
16 mm31,24'
18 mm31,24'
21 mm21,24'
25 mm21,24'
30 mm21,24'
40 mm21,24'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
16 mm41,24'
17 mm41,24'
18 mm31,24'
19 mm31,24'
20 mm31,24'
21 mm31,24''
23 mm21,24'
25 mm21,24'
27 mm & more11,24'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
28 mm21,55'
30 mm21,55'
32 mm21,55'
35 mm21,55'
40 mm & more11,55'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
17 mm41,55'
20 mm41,55'
22 mm31,55'
25 mm31,55'
30 mm21,55'
35 mm21,55'
40 mm21,55'
50 mm21,55'
60 mm11,55'
80 mm11,55'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
30 mm21,55'
32 mm21,55'
35 mm21,55'
40 mm21,55'
45 mm & more11,55'

7 mm1013'
9,5 mm813'
12 mm513'
16 mm413'
25mm213'
45 mm & more113'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
45 mm21,86'
50 mm21,86'
55 mm21,86'
60 mm21,86'
70 mm & more11,86'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
24 mm1026'6"
30 mm526'6"
40 mm426'6"
55 mm326'6"
75 mm226'6"
105 mm226'6"
155 mm & more126'6"

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
25 mm1026'6"
30 mm526'6"
40 mm426'6"
55 mm326'6"
75 mm226'6"
105 mm226'6"
135 mm & more126'6"

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
56 mm21,86'
60 mm21,86'
64 mm11,86'
70 mm11,86'
80 mm11,86'
90 mm11,86'
100 mm & more11,86'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
18 mm213'
25 mm113'
32 mm11,24'
40 mm11,55'
50 mm11,55'
75 mm11,86'
100 mm12,17'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
14 mm20,82'6"
18 mm213'
25 mm21,24'
32 mm11,55'
40 mm11,55'
50 mm11,55''
75 mm11,86'
100 mm11,86'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
18 mm213'
25 mm21,24'
32 mm11,55'
50 mm12,17'
75 mm12,48'
100 mm12,48'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
18 mm213'
25 mm21,24'
32 mm11,55'
40 mm11,55'
50 mm12,17'
75 mm12,48'
100 mm12,48'
135 mm1310'

LensRatioDistance plan film / mire
(meters)
Distance plan film / mire
(feet)
18 mm313'
25 mm21,24'
32 mm11,55'
40 mm11,86'
50 mm12,17'
65 mm12,17'
75 mm12,48'
100 mm12,48'
135 mm12,48'

18 mm10,82'6"
25 mm113'
32 mm113'
40 mm11,55'
50 mm11,55'
75 mm126'6"
100 mm126'6"

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