This project is an enclosure for a 5-inch round electroluminescent panel. I sized it to fit snugly over the end of the dew shield on my Canon® EF 300mm lens. This isn’t of much interest to the daytime photographer. I use it when generating “flats” for processing my astrophotographs.
In short, this project converts a 5-inch diameter panel to fit my 77mm lens.
The EL panel kit from Ellumiglow® has a very small control box to adjust the brightness and is powered by a 9v battery. It travels easily. I bought it directly from the manufacturer at this link:
The enclosure protects the panel and the entire assembly adds negligible weight to the mounted camera. A 3-foot cable keeps the weight of the control box and battery (which is not significant anyway) off the mount.
I’ve included the FreeCAD® project file so it can be modified for other size combinations. There are 4 bodies:
- Main enclosure. You’ll need to change the diameter, obviously, for a different size panel.
- Wire Passthrough. If the main enclosure is resized, make sure the passthrough still passes completely through the wall. It also protects the connector. Print this together with the main enclosure as one piece. The ready-made STL includes both. I plan to stuff a little silicone sealant into the opening to provide a little strain relief.
- T-Adapter. The outermost diameter should change as the main enclosure diameter changes. It is intended to fit snugly into the main enclosure without adhesive so you can exchange it for another T-adapter made for a different lens.
The innermost diameter should fit over the lens like a sleeve. It doesn’t need to be snug unless you point the lens towards the ground. If you change the inside diameter, you may need to change the outside diameter of the sleeve, too, to give it some strength. In that case, the cover will need to be adjusted, too.
- Cover. This should fit just snugly enough so it doesn’t fall off.
Sliced with CURA®. Supports are needed only for the wire passthrough. CURA® won't generate them for other bodies because, if oriented properly, there are no overhangs.