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DayStar QUARK H-Alpha Sunscreen, Prominences

Daystar Instruments QUARK is the first Hydrogen Alpha "Eyepiece"

Attach it to your refractor and turn it into a solar telescope

For use on refractors from F4 to F8 and up to 80mm aperture for short, non-tracking sessions.

From 80mm an ERF Filter (Energy Rejection Filter) will be needed for use with tracking

Recommended to always use the daystar UV/IR filter (article 63518) and mandatory from 150mm aperture


This new all-in-one design combines high quality components of a Daystar telecentric barlow, adapters, nozzles and hydrogen alpha filter in one simple assembly. Through efficiency and design optimization, users can now enjoy DayStar's renowned high-quality optics* at an affordable price.

Quark is available in a "prominence" or "chromosphere" option

~ Choose any for the same low price ~


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For use in refractors from F/4 to F/7 and up to 80mm aperture the user does not need to worry about settings.

Just insert it into your diagonal, add an eyepiece, and see.

The QUARK contains a custom Daystar Instruments 4.2X telecentric Barlow lens fully optimized in coatings and optical design specifically for the hydrogen alpha wavelength.

This highly specialized 4.2x telecentric lens offers superior field uniformity and allows you to achieve the device's ideal working focal length between F15 and F30.

The exact bandpass filter will vary depending on final telescope assemblies, so QUARK is qualified to display prominence or surface (chromosphere). A specific FWHM bandpass is not designated.

Now observers can choose to purchase a filter based on their observing goals rather than their budget.

Choose the prominences and detail of the surface (Chromosphere). Both are available for the same low price!

Fully optimized design eliminates the need for adapters.

Everything is combined in a lightweight device the size of an eyepiece.

The new compact design configuration eliminates unnecessary components, weight and associated costs. We've even reduced power consumption, so Quark can now run all day on an optional small, palm-sized battery.

Baffles have been added to increase contrast and the AR coatings are optimized for the 656nm wavelength.

*The QUARK array is a product of DayStar Instruments, utilizing DayStar Filters' Fabry Perot etalon technology.

1.25" or 2.0" combination eyepieces with safety notch slot directly on its diagonal

Standard 1.25 eyepiece drawtube output with optional 2" and SCT accessories available.

Brass compression ring to protect the eyepiece.

Uses USB power, 5v 1.5amp Includes 90-240VAC wall adapter with international plug adapters.

Adjustment knob allows wing change +/- 0.5Å with detents at every 0.1Å.

LED indicator for power, warm-up, ready and fault

5 year warranty.

Optional 8 hour battery pack available.

Integrated fully baffled 2-element telecentric 4.2X Barlow optimized for 656nm

Integrated 12mm blocking filter 21mm clear filter opening

Best performance with F/4 - F/7 refractors

Full viewing of the Solar disk possible on refractors up to ~450mm native focal length

No opening limitations. Can be used on larger refractors for higher magnification views combined with the energy rejection filters

Supplied in a convenient swivel case for safe, dust-free storage.

Not suitable for use in retro-reflectors or reflectors or with off-axis energy rejection ERF filters.

Housing No
Wavelength Hydrogen Alpha (6562.8Å)
Bandwidth N/A
Uniformity SE (Standard Edition)
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