Astrozap Focusing Screen For 5 1/2"-8 1/2" (139mm-216mm) Telescopes
Astrozap Focusing Screen For 5.5-Inch to 8.5-Inch (139 mm to 216 mm) Telescopes: This Astrozap Focusing Screen is a lightweight aluminum focusing screen with adjustable grommets.
This screen fits telescopes with outside diameters of 5.5-inches to 8.5-inches (139 mm to 216 mm). The thin design allows for optimal performance. The precision grid allows for perfect focus every time. Now quick and easy to attach to your telescope.
Manufacturer Product Number: 502
|Fits Telescope OD Range of||5.5" to 8.5" (139 to 216mm)|