DADSZCH

DSZCH

DayStar Filters

Daystar Filters' Calcium QUARK Ca H-Line Eyepiece Solar Filter departs from traditional K-line tuned filers and focuses on the 396.9nm H-line wavelength. This wavelength is closer to the visible spectrum and is therefore easier to see - especially older users who have trouble seeing the K-line. When using the filter for imaging the sun, H-line provides improved quantum efficiency, higher glass transmission, and improved performance from anti-reflection optical coatings. H-line also offers slightly more visible features due to the hydrogen contribution. Views through the filter show the chromosphere, plages/faculae, sun spots, and solar flares in a vibrant violet color with high-contrast.While there are no OTA aperture limitations, Daystar recommends the use of rear UV/IR cut filters for long-duration solar viewing sessions, or OTAs larger than 80mm (3.1"). For best results, they suggest using refractor-style scopes with focal ratios between f/7-f/30, and you can enjoy full-disk viewing with focal lengths up to 1800mm.This all-in-one filter design enables the use of nighttime telescopes for solar viewing, and is engineered to eliminate unnecessary components which reduced the size and weight. This streamlined form enables it to simply insert into 1.25" or 2" diagonals and accepts 1.25" eyepieces. The filter is powered via a micro-USB port, and Daystar includes a power cord and an AC adapter to meet the high-power requirements of 5 VDC 1.5A. To enable its use at home and abroad, a set of international outlet plugs is provided with adapters for the US, UK, EU, and Australia.Filter Properties Tuned to calcium H-line 3968.5 wavelengthUse to view chromosphere, plages/faculae, sun spots, and solar flaresIntegrated 25mm blocking filter with a 19mm clear filter apertureTuning knob allows for 0.5 wing shift for Doppler-shift compensationMarkers at every 0.1 for reference and repeatabilityOptical coatings are engineered for the Ca H-line 397nm wavelengthInternal baffles improve image contrastOperating temperature range: 0 to 100 F (-18 to 38 C), ambient outside temperatureLED indicators for power, warming, ready, and faultUse and Handling Standard configuration: 1.25" snout with a 67mm backfocusAdapters for adjusting backfocus: 2" front snout with a 61mm backfocus, 1.25" front snout with a 99mm backfocusAccepts 1.25" eyepieces and astrophotography adapters/accessoriesRecommended OTA Specifications No aperture limitationf/7 to f/30 refractor OTAs in full apertureFull disk viewing on refractors with a focal length up to 1800mmRear UV/IR cut filters recommendedNot compatible with red or yellow glass energy rejection filtersShort focal ratio refractors will need an optional 2x or 2.5x Powermate for best performancePower 5 VDC, 1.5A micro-USB port90-240 VAC wall adapterSet of international outlet plugs for US, UK, EU, and Australia