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dielectric (nonmetallic) coating is 99 percent reflective across the full visual spectrum
this 20 mm focal length eyepiece offer incredible value in an unusually nice eyepiece
The Baader Hyperion Aspheric eyepieces offer freedom from blackouts
Standard spotting scopes tend to be large and/or heavy
For views of the brighter deep space objects like galaxies and nebulae
Lunt Solar CaK Module For The LS130T Modular Telescope - LS130TCaKMD GPS dielectric (nonmetallic) coating is 99Lunt Solar CaK Module For The LS130T Modular Telescope This product provides you with a Lunt Solar Calcium K line (CA K) filter module, for your existing LS130T Modular Solar Telescope. This item will attach to the rear of your LS130THa Modular Solar Telescope and allow you to perform imaging at the Calcium K spectral line wavelength, instead of at the Ha line. Calcium K (Ca K) telescopes and filters are used to study the wavelength of 393. 4 nm. This
