Spectrum 11.50" Full Aperture Glass Solar Filter- 283MM to 289MM
The 11.50" Full Aperture Glass Solar Filter from Spectrum has been designed to fit telescopes with an OD range of 283mm to 289mm, and operates as a white light filter. This filter is a full aperture design, which means that it is designed to let you make full and complete use of the aperture of the telescope it has been attached to. It is suitable for any scope with an aperture between 283mm and 289mm. This translates to a range of 11.1" to 11.4" for optimal use.