Cartridge notch guide for finding out which ASA speeds your camera will recognize. It can also be used to see what speed a Super 8 film cartridge is set to.
The guide is available in three differently sized PDF files for easy printing:
Cartridge Notch Guide – A4
Cartridge Notch Guide – A5
Cartridge Notch Guide – US Letter
To use, simply cut out the guide and place it inside the camera making sure the camera locating notch is aligned with the cameras pin. You will then be able to see which speeds your camera has pins for. Some cameras have a set ASA speed for when none of the pins are pressed (i.e. A camera that only supports 40 & 160 ASA may just have one pin for 160 ASA, so if that pin is pressed in it is 160 ASA and if not it is 40 ASA). The only way to check this is by looking in the manual for your camera.
To check which speed a cartridge is set to, simply align the cartridge camera locating notch with the camera locating notch on the guide and you should then be able to see the speed the cartridge is set to.
The guide is based on the following information from the ANSI PH22.166-1981 standard.
| ASA Daylight | ASA Tungsten | Distance (mm) | Distance (inches) |
|---|---|---|---|
| 10 | 16 | 25.40 | 1.0 |
| 16 | 25 | 22.86 | 0.9 |
| 25 | 40 | 20.32 | 0.8 |
| 40 | 64 | 17.78 | 0.7 |
| 64 | 100 | 15.24 | 0.6 |
| 100 | 160 | 12.70 | 0.5 |
| 160 | 250 | 10.16 | 0.4 |
| 250 | 400 | 7.62 | 0.3 |
| 400 | 640 | 5.08 | 0.2 |
This information can also be found at the Kodak website.
Update: I have just discovered out that someone has already made a ruler just like this guide at the Super8Wiki website with a better explanation on how to use it. Definitely worth looking at!
