These filters are designed to work with NexStar 4GT telescopes.
Celestron Solar Filters
are made with Baader Astro Solar™ Safety Film. Far superior than any existing glass, Mylar
or polymer filters, they lead to brighter, sharper, and higher contrast images.
Enter the
new millennium with the finest solar filters available. Astro Solar™ Safety Film is clear
and homogenous and attains the optical performance of high quality plane-parallel glass filters-it
is diffraction limited! Double-sided metal coatings have uniform density and good color balance
across the entire field ensuring razor sharp images from edge to edge.
The Sun appears in
its "real "color -neutral white, not blue or orange ,and the sky adjacent to the solar limb is jet
black.
You can see detail in sunspots, bright faculae near the limb and the mottled areas
known as granules with these filters. The Sun offers constant changes and will keep your observing
interesting and fun. Even small aperture telescopes can enjoy features of the Sun.
The
Astro Solar™ film is completely safe and durable (won‘t break like glass if dropped). Its
rating is ND-5 which means that the film transmits 1/100,000 of visible light (.001%) while
reflecting (blocking) 99.999%of unwanted light. The film absorbs all ultraviolet rays while
coating reflects infrared light rendering both absolutely harmless. For added assurance, Baader
Astro Solar™ film has been declared safe for direct solar viewing by the German National
Bureau of Standards for eye safety.
Celestron has previously manufactured high quality,
plane-parallel glass solar filters (unlike today 's glass filters which generally are poor in
quality with reduced contrast). Celestron has offered Mylar solar filters (they were the best
previously available) but they suffer from a lot of scattered light and false color. Polymer
filters suffer from not only scattered light but also have reduced sharpness and contrast due to
their increased thickness. So, "we‘ve been there and done that" and after all these years are now
offering the finest solar filters available for observing. Each is mounted in a durable ABS or
rubber cell that won‘t break.
