I tried an inexpensive commercial ARD in the past and had some really bad luck. The one I tried crapped out the view in the scope so bad it was unusable. Since then, I found a website that sells a similar honeycomb material. I also thought most (not all) ARDs were a tad expensive for what they are so I figured what the heck. I ordered a 6 inch square piece of 1/2" thick polycarbonate with 1/8" diameter cells for the princely sun of $7.04 shipped. Not bad. I should probably add here that the site actually sells this for photography purposes. Anyway, when it arrived, I was surprised that it seems really nice for $0.15 per square inch. I took a box cutter and trimmed a small piece to fit in my flip cap, took maybe 5 minutes. Here's what I got.
Before
After
BTW, the website I got it from is;
http://www.honeycombgrids.com/diy-grid-material
I have no commercial association with the site.


Before

After

BTW, the website I got it from is;
http://www.honeycombgrids.com/diy-grid-material
I have no commercial association with the site.