Hotshoe laser sight
thingiverse
In the night, when you're using long focus distances (>70), it's not easy to know where are you exactly pointing at with the camera. This thing allows you to attach a cheap green laser (such as https://www.dx.com/p/powerful-5mw-532nm-green-laser-pen-laser-pointer-presenter-remote-lazer-hunting-laser-bore-sighter-without-battery-black-2021246.html#.Xa7Uu-czZ24) to the camera.
Download Model from thingiverse
With this file you will be able to print Hotshoe laser sight with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Hotshoe laser sight.