Hydrogen Alpha Filters

DayStar Filters is supplying research filters for the NSO.

"The National Solar Observatory is operated by the Association of Universities for Research in Astronomy, under a cooperative agreement with the National Science Foundation."

[ click here to read more about the GONG project ]


DayStar Filters are the academic 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.

The superior DayStar solid spaced etalon design is adaptable to a wide variety of astronomical telescope systems offers high enough uniformity to be introduced at the rear of the telescope. The T-scanner and Quantum series may be used on almost any telescope in the correct configuration.

DayStar's unique solid spaced technology achieves narrower bandpass in one etalon and superior uniformity 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 10Å or as narrow as 0.2Å 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.

This photo imaged by Dave Tyler, United Kingdom with 0.5Å Tscanner - priced at $4000

NOTICE:  4/10/2009 - Due to unanticipated demand,
SolaREDi telescopes are currently sold-out until after the July 22, 2009 eclipse.
We are accepting deposits only for deliveries expected August 1, 2009

DayStar gets Cabin Fever.
 ...braves snow and clouds to image with SolaREDi 60mm

[ See images from 7 scopes pulled from assembly on March 2, 2009 ]

Are You REDi? for more?

It's the first dedicated solar telescope designed around the serious imager.

Click here to learn more about the newly upgraded DayStar SolaREDi telescope.

News Bulletin:  

4/20/2009: DayStar to produce research filters for National Solar Observatory

4/21/2008:  DayStar announces new SolaREDi alpha scope.

5/1/2007 DayStar announces new Quantum Series Filters

1/28/2007 - DayStar Filters and amateur solar astronomy suffer loss of Vic Winter.

2/2/2006 - DayStar Filters is under new ownership.
ICSTARS owners, Vic & Jen Winter buy DayStar Filters from Del Woods.
Complete press release available here:

DayStar Filters LLC • 149 Northwest OO Highway • Warrensburg, MO 64093 - USA
Telephone: 866-680--6563 •
service@daystarfilters.com • FAX: 1-866-791-0448