Click to enlargeDAYSTAR Solar Filter & Telescope

Telescopes by DayStar Filters, Vixen Optics, Meade Telescopes, Celestron,& Barska Optics

DayStar Filters are the industry standard in narrow bandpass astronomical solar filters.  For decades, professional observatories and universities worldwide have counted on the superior quality and performance of DayStar filters.  They can be found in the world's major educational institutions and research facilities, both terrestrial and flown.

Designed to mount on the REAR of your existing telescope, the DayStar design is adaptable to a wide variety of astronomical telescope systems.

DayStar's unique technology achieves narrower bandpasses for more a more detailed image.  Combined, these design differences accomplish the highest quality view in contrast and resolution possible, limited only by seeing or diffraction.



DayStar ultra-narrow bandpass filters are available in half-bandwidth as wide as 10 or as narrow as 0.2 in the following wavelengths:

  • Hydrogen Alpha
  • Calcium H and K Line
  • Sodium D Line
  • custom wavelengths available upon request.

Take a look at DayStar Filters. You will like what you see.





Calcium II H line and K-line FiltersCalcium II H line and K-line FiltersDayStar is proud to offer Calcium H ( 3969 ) and two Calcium K-line (3933.7 ) filtering systems. Traditionally, university research has employed the Calcium K line for studies of Calcium on the Sun...

DayStar Energy Rejection Filter - Glass, Cell and CapDayStar Energy Rejection Filter - Glass, Cell and Cap
DayStar Energy Rejection Filters reduce the heat load on your filter assembly by absorbing or reflecting UV and/or I light and transmitting light in the desired visual spectrum. These filters are sometimes Red or Yellow glass, or dielectric IR and UV, but pass light in the desired visual spectrum. The ERF can also serve as an aperture mask to accomplish a straight angle of incidence for light entering the filter...






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