Turn your compatible telescope into an H-alpha solar instrument with the DayStar Quark and its built-in 4.2× telecentric eyepiece. F/4 to F/8 refractors are recommended; choose “Chromosphere” or “Prominence” when ordering, after confirming the mount and protective filter.
CHF 1'299.00incl. Swiss VAT
Disponible sur commande — expédition estimée : 10 jours à 3 semaines. Date d’expédition estimée : 29 October 2026.
The Daystar QUARK is a true H-alpha filter that fits in the palm of your hand and slides into an angled focuser just like a standard eyepiece. Yet it includes everything you need to observe the Sun in H-alpha (656 nm): a 4.2× telecentric Barlow lens optimized for this wavelength, a Fabry-Pérot etalon, a built-in shutter, and 1.25″ and 2″ adapters to integrate with your existing equipment.After verifying compatibility and installing the required protective filter, place the QUARK in the offset mirror, with an eyepiece behind it. Allow the filter to reach its operating temperature before observing.
QUARK performs at its best on refractors between f/4 and f/8. It works outside this range, but with some compromises on brightness or bandwidth finesse (details below).
Please specify the version when placing your order or contact me 🙂
The Quark allows you to observe H-alpha solar images while continuing to use a compatible telescope: achromatic, ED, apochromatic, or Petzval. A single filter can adapt to changes in your equipment, provided you readjust the mounting and protective cover each time you switch instruments.
This model, which features a built-in telecentric lens, is primarily designed for F/4 to F/8 refractors. See the DayStar Official Compatibility Checker to choose the right version. SCTs and Maksutovs require a specific configuration, generally around the Quark Combo. For Canon or Nikon lenses, the manufacturer offers a Camera Quark version and dedicated adapters: compatibility is not automatic with this model.
Protective filtration: Whether a UV/IR-cut filter or a front-end ERF is needed depends, in particular, on the instrument's diameter and design. Have the entire setup validated before pointing at the Sun, and follow the DayStar instructions.
Visit DayStar Solar Accessories allow you to adapt the connection to the eyepiece or camera: 1.25-inch or 2-inch connectors, T- or C-mounts, and adapters, depending on the model. Thread compatibility, focus extension, and focus must be checked for each combination. Accessories are sold separately.
In astrophotography, a DayStar tilt adapter can help reduce Newton's rings. The results depend on the camera and the settings; see the Manufacturer's installation instructions to choose the right adapter.
DayStar has been developing solar equipment for over 50 years. Whether for an introductory course, an educational activity, or an imaging program, Contact Deep Space Astronomy Please provide the model of your instrument, your camera (if applicable), and your lenses: we'll help you choose a suitable setup and provide a quote.
| Type | H-alpha all-in-one eyepiece format filter |
|---|---|
| Available versions | Prominence (wider band, brighter image) or Chromosphere (narrower band, better surface contrast) |
| Integrated optics | 4.2× telecentric barlow, 2 elements, optimized for 656 nm |
| Free opening | 21 mm |
| Interface | 1.25″ eyepiece output, 1.25″ and 2″ adapters supplied |
| Power supply | USB 5 V (1.5 A recommended), 90-240 VAC power adapter and international plugs supplied |
| Setting | Tuning wheel ±0.5 Å with 0.1 Å steps, status LED |
| Accessories included | Brass clamping ring, Twist-Case, adapters |
| Warranty | 5 years |
| Autonomy | Low power consumption, compatible with optional battery pack (up to 8h) |
| The ideal beach | f/4 to f/8 refractors, full-disc up to approx. 450 mm focal length |
This is the question I'm asked most often. The answer can be summed up in one sentence: both show the surface and the protuberances, but with a different bandwidth, and therefore a different compromise between brightness and contrast.
| Criteria | Chromosphere | Prominence |
|---|---|---|
| Bandwidth (FWHM) | Narrower, higher spectral selectivity | Wider, more light |
| Filaments and surface details | Clearly visible, that's its strong point | Less pronounced, sometimes invisible depending on conditions |
| Limb protuberances | Visible, sometimes with less contrast than in Prominence | Very bright and spectacular |
| Chromospheric contrast (patches, spots, granulation) | Excellent, ideal for detailing | Weaker, the emphasis is on brightness |
| Public type | Versatile observers, astrophotographers of the solar disk | Observers who mainly want spectacular protuberances |
| Visual sensation | Slightly darker image, rich in fine detail | Brighter image, eye-catching protuberances |
| Telescope type | What it looks like |
|---|---|
| Refractors f/4 to f/8 | Recommended configuration for optimum performance |
| Refractors beyond f/9 | Works, but darker visual image. More photo-oriented. |
| Refractors below f/4 | Works, brighter image but wider bandwidth |
| Large diameters | Can be used on large-diameter refracting telescopes with appropriate energy rejection; check the frontal ERF requirements based on the configuration |
| Off-axis configurations | The QUARK is not designed for this purpose. |
Yes, without exception. The difference is that Prominence makes them brighter and more spectacular, while Chromosphere reveals the filaments and fine texture of the surface.
No. The QUARK is a stand-alone H-alpha unit, designed to stand alone in the optical chain. Stacking unsuitable front-end filters is at best inefficient, at worst dangerous. The only exception is ERFs (Energy Rejection Filters), which are designed to operate upstream.
Yes, as long as you follow the manufacturer's instructions. Never point the Sun without equipment specifically designed and certified for this purpose.
Take the Chromosphere if :
Take the Prominence if :
In practice, the majority of our customers choose the Chromosphere for its versatility. But if you already know that what makes you tick is the protuberances, the Prominence will not disappoint.
