DX Code Decoder

This page is designed for photo film DX code decoding and analysis. DX codes are standardized markings found on 35mm film cartridges that automatically communicate film speed (ISO), number of exposures, and exposure tolerance to compatible cameras. The system uses both visual patterns (metallic contacts) and numeric codes to identify film characteristics.

DX Code

Film canister slot here
G
S1
S2
S3
S4
S5
G
L1
L2
L3
T1
T2
Film speed
Exposures
Exposure tolerance

DX Number

Assignee -
Product(s) -
Number of exposures -

DX Film

1
1
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
1
0
1
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
Assignee -
Product(s) -
Film specifier 0
Frame 0