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.

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.

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
10 mm	4	0,8	2'6''
12 mm	4	0,8	2'6''
14 mm	4	0,8	2'6''
16 mm	3	0,8	2'6''
20 mm	2	0,8	2'6''
24 mm	2	1	3'
32 mm	2	1	3'
40 mm	1	1,5	5'
50 mm	1	2	6'6''
85 mm	1	2	6'6''
100 mm	1	3	10'
135 mm	1	3	10'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
10 mm	2	0,8	2'6''
12 mm	3	0,8	2'6''
14 mm	2	0,8	2'6''
18 mm	1	0,8	2'6''
25 mm	1	1	3'
35 mm	1	1,6	3'
50 mm	1	1,5	5'6''
50 mm	1	2	6'6''
85 mm	1	2	6'6''

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
8 mm	8	0,6	2'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
9,5 mm	4	0,6	2'
12 mm	3	0,8	2'6''
16 mm	2	0,8	2'6''
25 mm	1	1	3'
35 mm	1	1,2	4'
50 mm	1	1,5	5'
85 mm	1	2	6'6''

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
14 mm	3	0,6	2'
16 mm	3	0,6	2'
20 mm	2	0,8	2'6''
24 mm	1	1	3'
28 mm	1	1,2	4'
32 mm	1	1,2	4'
40 mm	1	1,5	5'
50 mm	1	2	6'6''
65 mm	1	2	6'6''
85 mm	1	2	6,6"
100 mm	1	2,4	8'
135 mm	1	2,4	8'
180 mm	1	2,4	8'

2,4

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
16 mm	8	0,8	2'6"
18 mm	7	1	3''
21 mm	4	1	3'
25 mm	4	1,2	4'
27 mm	2	1,2	4'
32 mm	1	1,5	5'
35 mm	1	1,5	5'
40 mm	1	1,8	6'
50 mm	1	2	6'6"
75 mm	1	2,4	8'
100 mm	1	2,4	8'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
28 mm	1	1,4	4'6"
35 mm	1	1,7	5'6''
40 mm	1	1,8	6'
50 mm	1	2	6'6"
60 mm	1	2,4	8'
75 mm	1	2,7	9'
100 mm	1	3	10'
135 mm	1	3,6	12'
180 mm	1	4,5	15'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
24 mm	2	1	3'
29 mm	2	1,2	4'
35 mm	1	1,2	4'
50 mm	1	2	6'6"
85 mm	1	2	6'6"

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
11 mm	5	1,5	5'
16 mm	4	1,5	5'
25 mm	3	1,5	5'
35 mm	2	1,5	5'
50 mm	2	1,5	5'
80 mm	1	1,5	5'
110 mm	1	1,5	5'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
16 mm	8	1,2	4'
18 mm	7	1,2	4'
20 mm	7	1,2	4'
22 mm	6	1,2	4'
24 mm	5	1,2	4'
26 mm	5	1,2	4'
28 mm	4	1,2	4'
30 mm	3	1,2	4'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
45 mm	5	1,8	6'
60 mm	3	1,8	6'
70 mm	2	1,8	6'
90 mm	2	1,8	6'
120 & more	1	1,8	6'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
18 mm	5	1,1	3'6"
25 mm	3	1,1	3'6"
30 mm	2	1,1	3'6"
35 mm & more	1	1,1	3'6"

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
21 mm		1	3'
25 mm		1,1	3'6"
29 mm		1,2	4'
35 mm		1,5	5'
50 mm	1	2	6'6"
85 mm	1	2,4	8'
100 mm	1	2,4	8'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
100 mm	1	2,4	8'
135 mm	1	2,4	8"

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
29 mm	3	1,5	5'
35 mm	3	1,5	5'
40 mm	3	1,5	5'
45 mm	2	1,5	5'
50 mm	2	1,5	5'
55 mm	2	1,5	5'
60 mm	2	1,5	5'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
55 mm	2	1,8	6'
65 mm	2	1,8	6'
75 mm	2	1,8	6'
85 mm	1	1,8	6'
95 mm	1	1,8	6'
105 mm	1	1,8	6'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
15 mm	5	0,8	2'6"
18 mm		1	3'
21 mm		1	3'
25 mm		1,1	3'6"
29 mm		1,2	4'
35 mm		1,5	5'
50 mm	1	2	6'6"
85 mm	1	2,4	8'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
14,5 mm	5	0,8	2'6''
17,5 mm	5	1	3'
21 mm	5	1	3'
27 mm	3	1,2	4'
35 mm	3	1,2	4'
40 mm	2	1,5	5'
50 mm	2	1,8	6'
75 mm	1	2,4	8'
100 mm	1	2,4	8'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
14,5 mm	2	0,8	2'6''
17,5 mm	2	0,8	2'6''
21 mm	2	1	3'
27 mm	1	1,2	4'
35 mm	1	1,5	5'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
50 mm	1	1,8	6'
100 mm	1	1,8	6'
200 mm	1	2,4	8

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
24 mm	5	1,1	3'6"
28 mm	5	1,1	3'6"
30 mm	5	1,2	4'
35 mm	5	1,2	4'
40 mm	4	1,5	5'
50 mm	3	1,8	6'
75 mm	2	1,8	6'
100 mm	1	2,1	7'
150 mm	1	2,4	8'
180 mm	1	3	10'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
14,5 mm	5	1,2	4'
17,5 mm	4	1,2	4'
20 mm	3	1,2	4'
24 mm	3	1,2	4'
27 mm	2	1,2	4'
32 mm	2	1,2	4'
35 mm	2	1,2	4'
45 mm	1	1,2	4'
50 mm	1	1,2	4'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
17,5 mm	3	1	3'
21 mm	2	1	3'
24 mm	2	1	3'
29 mm	2	1	3'
32 mm	1	1	3'
34 mm	1	1	3'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
27 mm	4	1,2	4'
35 mm	3	1,2	4'
40 mm	2	1,2	4'
45 mm	2	1,2	4'
50 mm	1	1,2	4'
60 mm & more	1	1,2	4'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
19 mm	4	1,5	5'
21 mm	4	1,5	5'
24 mm	3	1,5	5'
27 mm	3	1,5	5'
30 mm	2	1,5	5'
35 mm	2	1,5	5'
40 mm	2	1,5	5'
50 mm	2	1,5	5'
65 mm	1	1,5	5'
90 mm	1	1,5	5'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
24 mm	5	1,8	6'
29 mm	5	1,8	6'
35 mm	3	1,8	6'
45 mm	3	1,8	6'
60 mm	2	1,8	6'
85 mm	2	1,8	6'
120 mm	2	1,8	6'
130 mm	2	1,8	6'
180 mm	1	1,8	6'
250 mm	1	1,8	6'
275 mm	1	1,8	6'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
60 mm	1	1,8	6'
65 mm	1	1,8	6'
70 mm	1	1,8	6'
80 mm	1	1,8	6'
85 mm	1	1,8	6'
95 mm	1	1,8	6'
105 mm	1	1,8	6'
115 mm	1	1,8	6'
125 mm	1	1,8	6'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
16 mm	1	0,8	2'6''
18 mm	1	1	3'
21 mm	1	1	3'
25 mm	1	1,2	4'
29 mm	1	1,2	4'
35 mm	1	1,4	4'6"
40 mm	1	1,5	5'
50 mm	1	1,8	6'
65 mm	1	1,8	6'
75 mm	1	2,4	8'
100 mm	1	2,4	8'
135 mm	1	2,4	8'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
15 mm	1	0,8	2'6''
18 mm	1	1	3'
21 mm	1	1	3'
25 mm	1	1,2	4'
29 mm	1	1,2	4'
35 mm	1	1,4	4'6"
40 mm	1	1,5	5'
50 mm	1	1,8	6'
75 mm	1	2,4	8'
100 mm	1	2,4	8'
135 mm	1	2,4	8'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
15 mm	4	1,2	4'
16 mm	3	1,2	4'
18 mm	3	1,2	4'
21 mm	2	1,2	4'
25 mm	2	1,2	4'
30 mm	2	1,2	4'
40 mm	2	1,2	4'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
16 mm	4	1,2	4'
17 mm	4	1,2	4'
18 mm	3	1,2	4'
19 mm	3	1,2	4'
20 mm	3	1,2	4'
21 mm	3	1,2	4''
23 mm	2	1,2	4'
25 mm	2	1,2	4'
27 mm & more	1	1,2	4'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
28 mm	2	1,5	5'
30 mm	2	1,5	5'
32 mm	2	1,5	5'
35 mm	2	1,5	5'
40 mm & more	1	1,5	5'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
17 mm	4	1,5	5'
20 mm	4	1,5	5'
22 mm	3	1,5	5'
25 mm	3	1,5	5'
30 mm	2	1,5	5'
35 mm	2	1,5	5'
40 mm	2	1,5	5'
50 mm	2	1,5	5'
60 mm	1	1,5	5'
80 mm	1	1,5	5'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
30 mm	2	1,5	5'
32 mm	2	1,5	5'
35 mm	2	1,5	5'
40 mm	2	1,5	5'
45 mm & more	1	1,5	5'

7 mm	10	1	3'
9,5 mm	8	1	3'
12 mm	5	1	3'
16 mm	4	1	3'
25mm	2	1	3'
45 mm & more	1	1	3'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
45 mm	2	1,8	6'
50 mm	2	1,8	6'
55 mm	2	1,8	6'
60 mm	2	1,8	6'
70 mm & more	1	1,8	6'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
24 mm	10	2	6'6"
30 mm	5	2	6'6"
40 mm	4	2	6'6"
55 mm	3	2	6'6"
75 mm	2	2	6'6"
105 mm	2	2	6'6"
155 mm & more	1	2	6'6"

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
25 mm	10	2	6'6"
30 mm	5	2	6'6"
40 mm	4	2	6'6"
55 mm	3	2	6'6"
75 mm	2	2	6'6"
105 mm	2	2	6'6"
135 mm & more	1	2	6'6"

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
56 mm	2	1,8	6'
60 mm	2	1,8	6'
64 mm	1	1,8	6'
70 mm	1	1,8	6'
80 mm	1	1,8	6'
90 mm	1	1,8	6'
100 mm & more	1	1,8	6'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
18 mm	2	1	3'
25 mm	1	1	3'
32 mm	1	1,2	4'
40 mm	1	1,5	5'
50 mm	1	1,5	5'
75 mm	1	1,8	6'
100 mm	1	2,1	7'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
14 mm	2	0,8	2'6"
18 mm	2	1	3'
25 mm	2	1,2	4'
32 mm	1	1,5	5'
40 mm	1	1,5	5'
50 mm	1	1,5	5''
75 mm	1	1,8	6'
100 mm	1	1,8	6'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
18 mm	2	1	3'
25 mm	2	1,2	4'
32 mm	1	1,5	5'
50 mm	1	2,1	7'
75 mm	1	2,4	8'
100 mm	1	2,4	8'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
18 mm	2	1	3'
25 mm	2	1,2	4'
32 mm	1	1,5	5'
40 mm	1	1,5	5'
50 mm	1	2,1	7'
75 mm	1	2,4	8'
100 mm	1	2,4	8'
135 mm	1	3	10'

Lens	Ratio	Distance plan film / mire (meters)	Distance plan film / mire (feet)
18 mm	3	1	3'
25 mm	2	1,2	4'
32 mm	1	1,5	5'
40 mm	1	1,8	6'
50 mm	1	2,1	7'
65 mm	1	2,1	7'
75 mm	1	2,4	8'
100 mm	1	2,4	8'
135 mm	1	2,4	8'

18 mm	1	0,8	2'6"
25 mm	1	1	3'
32 mm	1	1	3'
40 mm	1	1,5	5'
50 mm	1	1,5	5'
75 mm	1	2	6'6"
100 mm	1	2	6'6"