HOW TO: Build a Holga M-mount Lens

Step 12 Cut the Holga Barrel

Now, with the mini hacksaw, saw off the Holga lens barrel. Be cautious about the two plastic tabs that act as focus guides/stops. You can remove the two tabs with a heated knife, chisel it off with a flat head screw driver, or saw them off cleanly. Whatever works, just don't cut yourself.

Again, if you're glueing everything together, smoothen the edges to get a better bonding.