SVBONY SV228 Bahtinov Mask Telescope Focusing Cover

SVBONY SV228 Bahtinov Mask Telescope Focusing Cover 103mm For SV503 80ed & SV550 80 OTA

• Acrylic plastic; made with optical grade Acrylic material
• Red cover; vibrant red can express your passion for astronomy
• Protect the telescope; they are made of soft plastic so that they do not damage your telescope
• Aluminum  frame; strong and durable  for long service life
• Thin and light design; aluminium material thickness is 2 mm; light weight so you wont upset the balance on your scope
• Focus quickly; Bahtinov masks make the best focus for your telescope quickly and easily