Really sharp planetary images are only possible using an IR/UV blocking filter; this Astromania filter only allows the visible light between 400 and 680nm through; the UV and IR regions of the spectrum are completely blocked
CCD exposures of planets and stars - sharp images: A CCD camera is not only sensitive to visible light but also to other wavelengths; planets not only shine in visible light; but also in the infrared for example; but they are out of focus in
Blocking UV light: The harmful UV rays that can contribute to cataracts are filtered out; The filter is also essential when using a Herschel wedge
2 inch Kellner wide field eyepices with comfortable viewing position; Kellner eyepieces are a further development of the classical Kellner design; they have a more comfortable viewing position and better off-axis definition
High-level craftmanship the lenses are multi-coated and have blackened edges and a blackened interior; offering the budget-conscious amateur stargazer an excellent alternative to more sophisticated and expensive eyepieces