You will need: 6”x 8” rigid paper(card stock), cutter, floss, pencil and ruler
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Connect opposite corners with diagonal lines, this finds the center point.
2
Find 4” between diagonals, keeping the ruler parallel with the edge of the paper and mark points.
3
Do the same to the top line, keep it parallel! Then connect the dots with a line completely across.
4
Next we will be making the vertical lines by connecting the same dots to complete the rectangle.
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3” x 4” as an aspect ratio is 3:4. This ratio when we scale up will give 6” x 8” or 18” x 24”.
6
Carefully cut the window out. Use a safe surface if using an exacto.
7
Within the top 4” edge, mark out every inch, making 3 marks.
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Mark inches for each side all the way around. 2 marks on the 3” vertical sides, 3 on the horizontal
9
Go around and cut notches on every mark that you just made, they only need to be a little cuts.
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String the floss between and across notches and use tape to secure it when needed.
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I have looped the floss over to the next notch and kept it running.
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Finish the grid and when you are done you should have a gridded viewfinder with a 3:4 aspect ratio.
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There you go, a gridded viewfinder!
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