DayStar solar filter QUARK Gemini H-Alpha

Gemini QUARK - two filters in one!

Daystar offers its QUARK series H-alpha filters in two versions with different half-widths. The protuberance filters have a larger width, meaning they let more light through to improve the visibility of the protuberances at the edge of the sun. The chromosphere variant, on the other hand, shows the sun's disk in higher contrast thanks to its narrow half-width. With the QUARK Gemini you now get both variants in one H-alpha filter and can therefore switch to the optimal filter for your observations. This switching is done simply by a sliding mechanism, as is also known from filter sliders.

Daystar QUARK - transform your refractor into an H-alpha telescope
Wouldn't it be nice if you could just use your existing telescope to view solar prominences without having to buy a special solar telescope? The Daystar QUARK is the first H-alpha eyepiece with which this is possible!

Simply place this special eyepiece in the focuser of your refractor. And then, as if by magic, it becomes a fully-fledged H-alpha telescope.


One QUARK to see everything - that's all you need
QUARK is a world first because it is a compact all-in-one filter package. Simply insert QUARK into the star diagonal of your refracting telescope like an eyepiece. And you can now observe impressive spicules, protuberances or filaments. The prominences at the edge of the sun appear bright and extremely detailed.

Full solar image: optimal image for refractors f/4 to f/9
For the best observation results, this solar filter should be used on refracting telescopes with an aperture ratio between f/4 and f/9. With refractors with a focal length of up to 450 millimeters, you can see the entire solar disk. For example, simply take your guidescope or travel refractor and turn it into an H-alpha telescope.

For small telescopes you don't need anything else
With small telescopes, QUARK alone is sufficient. Up to a lens diameter of around 80mm you do not need to use any additional filters. Inserting Quark into the focuser is sufficient. For slightly larger refractors, Daystar recommends using a UV/IR energy filter.

To avoid damage, we recommend using an Energy Rejection Filter (ERF) on telescopes with an aperture of 80 mm or larger or for longer observations. This can be a UV/IR cut filter placed in front of the diagonal mirror, or a full aperture red or yellow glass ERF placed in front of the telescope.

Telecentric Barlow lens 4.2x
The new all-in-one design combines high-quality components of a telecentric 4.2x Barlow lens and an H-alpha filter in one simple accessory. The 12mm block filter sits in front of the Barlow lens and is completed by a standard ethalon filter. The optical design is optimized for a wavelength of 656nm, producing a flat field of view for visual observation and photography.

The advantages at a glance:

    1.25 inch and 2 inch socket with safety groove
    Simply convert your refractor into an H-alpha telescope
    optimal for refractors from f/4 to f/9
    Temperature-controlled filter with USB connection and power supply

With QUARK you don't need an extra solar telescope. Now everyone can experience the most beautiful H-alpha observations for a moderate price. Simply insert it into your telescope and get started.

Other interesting details:

    Fine tuning setting +/-0.5
    LED display for filter readiness
    12mm block filter
    21mm free opening of the filter
    For telescopes over 80mm UV/IR ERF protective filter required in front of the diagonal mirror
    Telecentric 4.2x Barlow lens optimized for 656nm
    Slot with spring ring clamp for 1.25" eyepieces
    With refractors up to 450mm, the entire solar disk is visible
    There is no limit to the telescope aperture; larger refractors allow detailed observations
    Storage box included
    not suitable for off-axis telescopes