bellows for large format camera

Step 2 Layout

first decide on the spacing you want in your bellows .
if you make it for a small camera you may want to use a 1cm spacing but this is hard to work with for a guy with big fingers like me so i chose to use one half inch.
measure very carefully all from the same end of the sheet and mark exactly on the lines of the ruler with a sharp pencil.
measure on both sides and up the middle.
then line up your straight edge on all 3 marks{if they dont line up then the measurement is off}.
when the straightedge is lined up hold it firmly and score the sheet with a ball point pen(not so deep as to cut through but to score it so it will hinge on the mark you may want to practice this on some scrap) .
if the ruler didnt move you will have a nice score paralell with the edge of the sheet congrats(now do it again until you get in as far as you want it}
in this case 12 inches