Daystar Quark Gemini Hydrogen Alpha Filter

Daystar Quark Gemini Hydrogen Alpha Filter

Daystar Quark Gemini features both prominence and chromosphere bandpass filters for instant slide-action switching between views.

Now, observers can enjoy the best of both options in one easy to use tool with no equipment swapping or refocusing of any kind.

Simply push the slider arm side to side (like in an eye exam) to see the broad stroked prominences of wider bandpass, then the high contrast of narrow bandpass.

For use on refractors of f/4 to f/8**. No need to worry about configurations; just insert in your diagonal, add an eyepiece and view.

The patent pending 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 telecentric lens offers superior field flatness.

Exact filter bandpass will vary depending on final telescope application, so QUARK* assemblies are qualified with one element to show best prominences and the other to show best surface contrast (chromosphere). No specific FWHM bandpass is designated.

Outreach astronomers can use the prom / chrom switch to demonstrate different features. Imagers can do the same to create comparison images without needing to change equipment or refocus.

Daystar´s new fully optimised design eliminates unnecessary components, weight and associated costs. They have also reduced power consumption so the Quark* can operate all day off a small, palm-sized optional battery pack. Integrated baffles increase contrast and AR optical coatings are optimised for the 656 nm wavelength.

* The QUARK assembly is a product of DayStar Instruments, using DayStar Filters´ Fabry-Perot etalon technology.
** QUARK Filters may be used at shorter and longer focal ratios than recommended. F-ratios of f/9 and higher will offer a dimmer visual view and may only be bright enough for photographic applications. F-ratios of less than f/4 will be brighter, but also widen the effective FWHM bandpass performance of the QUARK filter.

Ships in a sturdy watertight equipment case for dust & humidity-free storage.

Features

Contains TWO separate Fabry-Perot etalon elements which may be shifted safely via push-pull into view

A hand-matched pair of narrower (<0.5 Å FWHM) and wider (>0.6 Å FWHM) etalons shall be SE grade and independently tuneable

Two tuning knobs allow wing shifting +/- 0.5 Å with detents at every 0.1 Å

Ships with male combo 1.25" or 2.0" combo barrels with safety indent slot directly into your diagonal

Ships with standard 1.25" receptacle

Brass compression ring to protect eyepiece

Uses USB power, 5 V 2.0 A

Includes 90-240 V AC wall adapter with international plug adapters

LED indicator for power, warming, ready, fault

5 year warranty

Integrated, fully baffled 2 element telecentric 4.2x Barlow lens optimized for 656 nm.

Integrated 12 mm blocking filter

22 mm clear filter aperture

Best performance with f/4 - f/8 refractors

Full disk viewing possible on refractors up to ~450 mm focal length refractors

No aperture limitations. May be used on larger refractors for higher magnification views

Ships in watertight pelican style equipment case for dust & humidity-free storage.

Not suited for off-axis application

Important note regarding use with Energy Rejection Filters (ERF) from Daystar

For use with refractors with oil-spaced objective lenses, a front mounted ERF is MANDATORY regardless of aperture to preserve the performance of the telescope.

For use with refractors with air-spaced objective lenses:

Up to 80 mm in aperture, no ERF is required, either in front of the diagonal or over the front of the telescope.

With 80 mm to 150 mm in aperture, a UV/IR blocking filter placed in front of the diagonal will be sufficient.

With 150 mm in aperture and higher, a front mounted ERF as well as a UV/IR in front of the diagonal is required.

- Quark Gemini
- USB cable
- Wall adapter for 110-240 V AC including international power plugs
- Instruction manual
- Hard case

Safety informations: PDF Download