Moon Filter for Hadley

This 61 mm aperture mask works as filter to reduce the brightness of the moon. It reduces the amount of light entering the telescope by 75%.

I found the full moon quite bright to look at and leaving an afterimage, even after letting my eye adjust for a little while. There are moon filters to put onto the eye piece, but I didn't have one of those around.  

The mask works well; it reduces brightness and eliminates the afterimage effect so looking at the moon for a prolonged period of time is more relaxing.

Printing instructions

• Imperial and Metric versions included
• Any material should work, in default setting
• Black color recommended
• No supports required

Use instructions

• Simply press it onto the top of the telescope tubes/rods.
• Do NOT use it to look at the sun.

Creator's note

Hadley is a fun thing to design for, see my other add-ons in Redlow's Hadley Add-Ons Collection