Originally Posted by
sharktooth
When you pull the dark slide out and push it back in again, the septum is now fully forward and is unshielded. If you pull the dark slide out again, and push it back in again, then nothing has changed (septums didn't change position), so you could double expose.
This gets a little tricky with grafmatics compared to regular film holders. With a regular film holder, if you decide not to take the shot after pulling the dark slide, you can just put the dark slide back in and be back where you started. This doesn't work with a grafmatic. If you decide you don't want to take the shot after pulling out the darkslide and pushing it in again, you're now in a dilemma. The darkslide is no longer protecting the film, so you can't remove the grafmatic without exposing that sheet. You could advance the sheet without exposure, but then you've got to keep track of that somehow. It can get complicated. Leaving the grafmatic in the camera is another option, but that can get complicated too if you forget that you didn't advance the septums after the last exposure. There is a little tab that tells you if a septum is not shielded, but it doesn't tell you if it has already been exposed.
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