When it comes to cameras and accessories, I am pretty good at determining how things work, but this 4x10 insert for a deardorff 8x10 back has me stumped.
It would seem to me that the two "tongues" on either end of the insert should fit, flush, into the slots in the front (interior portion) of the glass back, so that there is an even distance from the insert to the glass/film. My insert does not want to do this.
The length of the insert, tongue to tongue, is 258mm; the the length inside of the tongues is 246mm. One tongue is 3mm wide and the other is 8mm. The back of the glass back is 248mm.
When I put the long tongue into the side of the back that has the spring, the the opposite end of the insert seems too long by the width of the tongue, 3mm.
Is the long tounge too long? Is it not suposed to fit flush? Any suggestions rom your experiences? I don't want to start cuttin this to fit if I don't have too. Any help is appreciated.