10
Introduction to the ARRI SIGNATURE PRIMES
length on an ALEXA S35 camera. The table below shows the
corresponding conversion factors and equivalent focal lengths
for the different formats for the ARRI SIGNATURE PRIME focal
lengths.
Alexa LF 16:9 to
Alexa LF Open Gate to
Signature
Prime
Alexa
2.8k
[mm]
Alexa
3.2k
[mm]
Alexa
3.4k
[mm]
Alexa
2.8k
[mm]
Alexa
3.2k
[mm]
Alexa
3.4k
[mm]
12 mm
9
10
11
8
9
9
15 mm
11
12
13
10
11
12
18 mm
14
15
16
12
13
14
21 mm
16
17
19
14
15
16
25 mm
19
21
22
16
18
19
29 mm
22
24
26
19
21
22
35 mm
26
29
31
23
25
27
40 mm
30
33
36
26
28
31
47 mm
35
39
42
30
33
36
58 mm
44
48
52
38
41
45
75 mm
56
62
67
49
53
58
95 mm
71
78
84
62
68
73
125 mm
94
103
111
81
89
96
150 mm
113
124
133
97
107
115
200 mm
150
165
178
129
142
154
280 mm
210
231
249
181
199
215
Con-
version
Factor
1.33x
1.21x
1.12x
1.54x
1.40x
1.30x
Example: If you normally use an ALEXA LF in Open Gate mode
and want to switch to ALEXA S35 3.2k mode, the corresponding
conversion factor is 1.40x. Hence, a 40mm lens on the ALEXA LF
is equivalent to a 40mm /1.40 = 28.6mm lens on the Alexa S35.
Probably a 28mm lens will do a good job.
