Photo detail

Camera Maker Nikon Corporation Camera Model NIKON D90
Aperture f/4.2 Color Space sRGB
Exposure Value 0 EV Exposure Program Unknown: 0
Exposure Time 1/60 sec Flash Flash, Auto-Mode, Return light detected
Focal Length 32 mm ISO 800
Metering Mode Pattern Date/Time 2017:03:12 09:27:14
Resolution Unit Inch X Resolution 240 dots per ResolutionUnit
Y Resolution 240 dots per ResolutionUnit Compression Jpeg Compression
Contrast 0 Exposure Mode 0
Saturation 0 Scene Type Directly Photographed
Sharpness 0 Caption This design makes the center rib taller and thicker, and adds a rib all around the rim to prevent any mishaps there with the eyepiece holders. Instead of the clips. this uses three machine screws and nuts per joint ($1 at Walmart) utilizing the thickness of the clip in the part itself. Rather than the one-piece center hole, each part has its own rib, and the perimeter rib attaches to the center around the 2" slot. I ran out of red glow-in-the-dark material after the first print, and no one has any more of it, so I switched to some orange material I had. It printed ok, but was pulling up the tape at the edges, so there's some small amount of curvature.