Meade ETX-80 90mm Solar Filter under $15

This is a 90mm threaded Solar Filter designed for the Meade ETX-80. It may thread into other scopes with an inside diameter of ~90mm.

WARNING: Be careful with your eyesight. Use certified solar film. Check for light leaks. Cover all other optics when pointing at the sun.

This is the 4" solar film that I used: https://amzn.to/3xpAi18

Print Guidelines:

• Any filament should do
• No supports needed
• 50% or higher infill for rigidity

STEP 1 - Get everything together
 

• Inner Ring (Shown Printed in Blue) 
• Outer Ring (Shown Printed in White)
• 4" Certified Solar Film https://amzn.to/3xpAi18
• Glue/CA Glue (Gorilla Glue Brush and Nozzle)
• Razor Knife https://www.thingiverse.com/thing:17551

STEP 2 - Apply Glue on Inner Ring

Brush or apply a thin coating on the flat surface of the Inner Ring. Threads should be facing DOWN.

STEP 3 - Attach Film to Inner Ring

Lay the Solar Film on a flat clean surface. Make sure the silver side of the the film will be facing TOWARDS the Sun.

Flip the inner ring over and press down for about a minute for the glue to set. Threads should be facing UP.

STEP 4 -Trim excess film

Using a Sharp Razor knife, trim off excess film. The film I used took a few medium pressure passes, but it cuts easy.

STEP 5 - Apply Glue on inside of Outer Ring

Apply a thin coat of CA on the underside of the OuterRing.

STEP 6 - Fuse Outer and Inner Ring

Flip the Outer ring over and place down over Inner Ring. Press and hold firmly for 60 seconds until glue sets.

DONE! Get outside and check out the sun!