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DayStar SODIUM Quark Solar filter
Daystar Filters’ Sodium QUARK Na D-Line Eyepiece Solar Filter is built to use a traditional nighttime astronomical OTA for solar observation. It departs from traditional K-line tuned filters, and focuses on the 5895.9â„« D-line wavelength. This wavelength is very narrow but also very bright, so a specialized filter is required to isolate it. Na D-line is a low excitation line emitted when the low chromosphere is heated, usually at footprints of flux loops passing through a flare, as sodium D line reflects the lower chromosphere it shows impulsive-phase flare eruption kernels. Visual and photographic images will also reveal sunspot detail, plague, and granulation, but are much brighter and more easily visible. This configuration of the QUARK is not suited for off-axis application.
Filter Properties :
Tuned to sodium Na D-line 5895.9â„« wavelength
Use to view impulsive-phase flare eruption kernels, sunspot detail, plague, granulation
Integrated 12mm blocking filter with a 21mm clear filter aperture
Tuning knob allows for ±0.5â„« wing shift for Doppler-shift compensation
Markers at every 0.1â„« for reference and repeatability
Optical coatings are engineered for the Na D-line 589nm wavelength
Internal baffles improve image contrast
Compatible with yellow glass ERFs — red filters will not pass Sodium
Use and Handling
Use traditional astronomical telescopes for solar viewing
Standard configuration: Accepts 1.25″ eyepieces and astrophotography adapters/accessories
Integrated 4.2x Barlow lens to effectively boost the magnification of any eyepiece used
Telecentric lens configuration ensures consistent image quality across the field of view
Includes a 1.25″ snout, with an optional 2″ available to fit larger drawtubes
LED indicators for power, warming, ready, and fault
Recommended OTA Specifications
No aperture limitation
f/4 to f/8 refractor OTAs in full aperture
Full disk viewing on refractors with a focal length up to 450mm
Rear UV/IR cut filters recommended
Not suited for off-axis application
Power:
5 VDC, 1.5A micro-USB port
90-240 VAC wall adapter
Set of international outlet plugs for US, UK, EU, and Australia
