150mm EL Flat panel for 150mm and smaller telescopes

This flat panel design features an inner sloping-wall to self-centre it for an OTA inner diameter of 160mm or bigger. It is built around an EL panel from El Wire Craft UK (16cm diameter EL Panel ).

It is light weight and will easily sit on top of smaller scopes, I have used it for my 70mm refractor and 135mm Samyang lens. I've found it easier to use than a tablet or phone.

1. The EL panel inverter is mounted to the back of the lid with two m3 bolts.
2. The EL panel fits within the lid and is held in place by a retaining ring. 
3. The retaining ring is secured by a small dop of glue between the ring and thelid opposite the cable entry.
4. The cable is fed through the hole in the lid to connect to the inverter.
5. The ring and lid are clamped by two m3 bolts to keep the cabling secure

You can print this design in PLA or PETG. I chose a matte black PLA.

Practical notes:

• Don't be concerned if the panel looks mottled to you. When your scope is focused on infinity, it will only see an even illumination. 
• If the scope is not focused on infinity you will see uneven illumination. 
• Don't be concerned that the light it isn't pure white - as long as the flat is properly exposed with the median around 50% (32000) the flat is fine to use.