Open main menu
Home
Random
Recent changes
Special pages
Community portal
Preferences
About Wikipedia
Disclaimers
Incubator escapee wiki
Search
User menu
Talk
Dark mode
Contributions
Create account
Log in
Editing
DX encoding
(section)
Warning:
You are not logged in. Your IP address will be publicly visible if you make any edits. If you
log in
or
create an account
, your edits will be attributed to your username, along with other benefits.
Anti-spam check. Do
not
fill this in!
====Exposure tolerance==== The remaining two bits of the second row give four ranges of exposure tolerance, or latitude. The complete encoding scheme is illustrated in the truth table below using letters and color. * "G" is ground. * "T" means the contact is connected to ground. * "F" means the contact is disconnected from ground. <div> {| class="wikitable" style="text-align:center;font-size:90%;" |+Standard film speed encoding ! rowspan=2 | [[Film speed]]<br/>(ISO) ! colspan=6 | 1st row DX contacts | style="font-size:15%;background:#448;" rowspan=10 | ! rowspan=2 | [[Film speed]]<br/>(ISO) ! colspan=6 | 1st row DX contacts | style="font-size:15%;background:#448;" rowspan=10 | ! rowspan=2 | [[Film speed]]<br/>(ISO) ! colspan=6 | 1st row DX contacts |- | style="background:#7f7;" | G | style="background:#f77;" | S1 || style="background:#f77;" | S2 || style="background:#f77;" | S3 | style="background:#f77;" | S4 || style="background:#f77;" | S5 | style="background:#7f7;" | G | style="background:#f77;" | S1 || style="background:#f77;" | S2 || style="background:#f77;" | S3 | style="background:#f77;" | S4 || style="background:#f77;" | S5 | style="background:#7f7;" | G | style="background:#f77;" | S1 || style="background:#f77;" | S2 || style="background:#f77;" | S3 | style="background:#f77;" | S4 || style="background:#f77;" | S5 |- ! 25/15° | style="background:#7f7;" | G | style="background:#000;color:#fff;" | F || style="background:#000;color:#fff;" | F || style="background:#000;color:#fff;" | F | style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F ! 32/16° | style="background:#7f7;" | G | style="background:#000;color:#fff;" | F || style="background:#000;color:#fff;" | F || style="background:#000;color:#fff;" | F | style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T ! 40/17° | style="background:#7f7;" | G | style="background:#000;color:#fff;" | F || style="background:#000;color:#fff;" | F || style="background:#000;color:#fff;" | F | style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T |- ! 50/18° | style="background:#7f7;" | G | style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F || style="background:#000;color:#fff;" | F | style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F ! 64/19° | style="background:#7f7;" | G | style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F || style="background:#000;color:#fff;" | F | style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T ! 80/20° | style="background:#7f7;" | G | style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F || style="background:#000;color:#fff;" | F | style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T |- ! 100/21° | style="background:#7f7;" | G | style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F | style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F ! 125/22° | style="background:#7f7;" | G | style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F | style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T ! 160/23° | style="background:#7f7;" | G | style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F | style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T |- ! 200/24° | style="background:#7f7;" | G | style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F | style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F ! 250/25° | style="background:#7f7;" | G | style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F | style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T ! 320/26° | style="background:#7f7;" | G | style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F | style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T |- ! 400/27° | style="background:#7f7;" | G | style="background:#000;color:#fff;" | F || style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T | style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F ! 500/28° | style="background:#7f7;" | G | style="background:#000;color:#fff;" | F || style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T | style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T ! 640/29° | style="background:#7f7;" | G | style="background:#000;color:#fff;" | F || style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T | style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T |- ! 800/30° | style="background:#7f7;" | G | style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T | style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F ! 1000/31° | style="background:#7f7;" | G | style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T | style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T ! 1250/32° | style="background:#7f7;" | G | style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T | style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T |- ! 1600/33° | style="background:#7f7;" | G | style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T | style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F ! 2000/34° | style="background:#7f7;" | G | style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T | style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T ! 2500/35° | style="background:#7f7;" | G | style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T | style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T |- ! 3200/36° | style="background:#7f7;" | G | style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T | style="background:#fff;color:#000;" | T || style="background:#000;color:#fff;" | F ! 4000/37° | style="background:#7f7;" | G | style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T | style="background:#000;color:#fff;" | F || style="background:#fff;color:#000;" | T ! 5000/38° | style="background:#7f7;" | G | style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T | style="background:#fff;color:#000;" | T || style="background:#fff;color:#000;" | T |} </div> <div style=display:inline-grid> {| class="wikitable" style="text-align:center;font-size:90%;" |+Custom film speed encoding ! rowspan=2 | ISO speed ! colspan=6 | 1st row DX contacts |- | style="background-color:#7fff7f;" | G | style="background-color:#ff7f7f;" | S1 | style="background-color:#ff7f7f;" | S2 | style="background-color:#ff7f7f;" | S3 | style="background-color:#ff7f7f;" | S4 | style="background-color:#ff7f7f;" | S5 |- ! ''custom 1'' | style="background-color:#7fff7f;" | G | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F |- ! ''custom 2'' | style="background-color:#7fff7f;" | G | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F |- ! ''custom 3'' | style="background-color:#7fff7f;" | G | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F |- ! ''custom 4'' | style="background-color:#7fff7f;" | G | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F |- ! ''custom 5'' | style="background-color:#7fff7f;" | G | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F |- ! ''custom 6'' | style="background-color:#7fff7f;" | G | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F |- ! ''custom 7'' | style="background-color:#7fff7f;" | G | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F |- ! ''custom 8'' | style="background-color:#7fff7f;" | G | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F |} </div> <div style=display:inline-grid> {| class="wikitable" style="text-align:center;font-size:90%;" |+'''Film length''' ! rowspan=2 | Exposures ! colspan=6 | 2nd row DX contacts |- | style="background-color:#7fff7f;" | G | style="background-color:#ffff7f;" | L1 | style="background-color:#ffff7f;" | L2 | style="background-color:#ffff7f;" | L3 | style="background-color:#7fffff;" | T1 | style="background-color:#7fffff;" | T2 |- ! ''other'' | style="background-color:#7fff7f;" | G | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#7f7f7f;" | | style="background-color:#7f7f7f;" | |- ! 12 | style="background-color:#7fff7f;" | G | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#7f7f7f;" | | style="background-color:#7f7f7f;" | |- ! 20 | style="background-color:#7fff7f;" | G | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#7f7f7f;" | | style="background-color:#7f7f7f;" | |- ! 24 | style="background-color:#7fff7f;" | G | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#7f7f7f;" | | style="background-color:#7f7f7f;" | |- ! 36 | style="background-color:#7fff7f;" | G | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#7f7f7f;" | | style="background-color:#7f7f7f;" | |- ! 48 | style="background-color:#7fff7f;" | G | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#7f7f7f;" | | style="background-color:#7f7f7f;" | |- ! 60 | style="background-color:#7fff7f;" | G | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#7f7f7f;" | | style="background-color:#7f7f7f;" | |- ! 72 | style="background-color:#7fff7f;" | G | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#7f7f7f;" | | style="background-color:#7f7f7f;" | |} </div> <div style=display:inline-grid> {| class="wikitable" style="text-align:center;font-size:90%;" |+'''Exposure tolerance''' |- ! rowspan=2 | Exposure tolerance<br/>(in [[f-stop]]s) ! colspan=6 | 2nd row DX contacts |- | style="background-color:#7fff7f;" | G | style="background-color:#ffff7f;" | L1 | style="background-color:#ffff7f;" | L2 | style="background-color:#ffff7f;" | L3 | style="background-color:#7fffff;" | T1 | style="background-color:#7fffff;" | T2 |- ! ±½ | style="background-color:#7fff7f;" | G | style="background-color:#7f7f7f;" | | style="background-color:#7f7f7f;" | | style="background-color:#7f7f7f;" | | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#000000; color:#ffffff;" | F |- ! ±1 | style="background-color:#7fff7f;" | G | style="background-color:#7f7f7f;" | | style="background-color:#7f7f7f;" | | style="background-color:#7f7f7f;" | | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#000000; color:#ffffff;" | F |- ! +2 −1 | style="background-color:#7fff7f;" | G | style="background-color:#7f7f7f;" | | style="background-color:#7f7f7f;" | | style="background-color:#7f7f7f;" | | style="background-color:#000000; color:#ffffff;" | F | style="background-color:#ffffff; color:#000000;" | T |- ! +3 −1 | style="background-color:#7fff7f;" | G | style="background-color:#7f7f7f;" | | style="background-color:#7f7f7f;" | | style="background-color:#7f7f7f;" | | style="background-color:#ffffff; color:#000000;" | T | style="background-color:#ffffff; color:#000000;" | T |}<ref name="Paul_2005_DX-CAS"/> </div> {{Clear}}
Edit summary
(Briefly describe your changes)
By publishing changes, you agree to the
Terms of Use
, and you irrevocably agree to release your contribution under the
CC BY-SA 4.0 License
and the
GFDL
. You agree that a hyperlink or URL is sufficient attribution under the Creative Commons license.
Cancel
Editing help
(opens in new window)