Godox Optical Snoot

This is a remix of Schweinert's Gobo Projector. I updated the lens holder to work with the types of extension tubes that seem to be more readily available on Amazon than the kind that he used. This works with the Godox V1, AD100 PRO, and the AD200 PRO flash with the H200R round head. The STL for the lens holder piece is included here. For the rest of the parts, visit Schweinert's original post. He also has a blog article with further details.

My version is designed for the Viltrox extension tubes that I own, but I am including the Fusion360 file and step file for easy customization for other extension tubes. I am using EF extension tubes, but this can probably be modified for extension tubes that fit other mounts as well.

To print,  I used paint on supports to add support for the overhang at the opening for the lens release switch. I adjusted the screw holes so M3 screws can be used to connect the lens holder to the projector. To use, put the 20mm extension tube inside the lens holder. The 12mm extension tube locks onto that from outside of the lens holder.

Fusion 360 Instructions

I tried to make the Fusion360 file as easy as possible to work with. I grouped and labelled the timeline steps and I set it up so a lot of customization can be done by modifying the following parameters:

• TubeDiameter - The diameter of your extension tube. Do not include the lens release switch
• RimWidth, RimHeight - On my extension tubes, the black plastic casing sits out a little further than the metallic silver part that connects to the lens or other tube. The rim this creates is used to lock the extension tube in place
• SwitchWidth, SwitchHeight - The width and height (measured outward from the body) of the lens release switch
• SwitchLength - This includes the length of the switch and the space it travels.
• OuterTubeLength - This is the length of the extension tube being used outside. The distance from the end of the extension tube where the lens will connect to the focal point (where the gel or gobo will go) should be 44mm for Canon EF lenses. This parameter is used to adjust the size of the lens holder to keep the total length correct. (If your tube is too far off from the 12mm one I used, entering the value might break the model. You'll have to edit the model another way if this is the case)
• ExtraTolerance - a little extra space so the inner extension tube can slide in and out easily