BDCJ D76F300 Sphere Primary Mirror + Secondary Mirror for Astronomical Telescope

Description

• D76F300 Sphere Primary Mirror + Secondary Mirror for Astronomical Telescope
• Caliber: 76mmFocal length: 300mm
• The primary mirror of a spherical reflector telescope
• 20mm short axis (short side diameter) secondary mirror.
• Pack include:Primary Mirror + Secondary Mirror Set

The main mirror is made of K9 glass with a diameter of 78 mm, a focal length of about 300 mm and a short axis of 20 mm.
Its surface is coated with aluminium film and alumina protective film.
Its aperture and focal ratio are relatively small.
It is suitable for buying and practicing hands or being used as a children's telescope.
According to feedback from friends who have done so, dozens of ring mountains can be photographed.


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