Not likely that it can be done practically. The roll film cameras use rollers to control position, and it is not relaibe..... It is best to "burn" the roll for 1 image, if the scene is that important.....

BTW, a 5x7 camera can make beautiful 6x17 negs... just use a full sheet of 5x7 film and cut out the middle ssection of the neg... or crop it....


Frank