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DayStar Filters

Building on the success of the standard versions of their Quark, Daystar Filters designed this version of the Camera Quark H-Alpha Solar Filter to fit Nikon F camera bodies and lenses to allow imaging or viewing prominences. To fit your camera system, the each end is equipped with a corresponding bayonet mount for easy attachment, and full disk viewing possible on lenses up to ~450mm focal length. A rear 1.25" eyepiece adapter is included to allow the use of traditional astronomical eyepieces. This adapter essentially converts your lens into a solar telescope. Daystar recommends the use of red, orange or yellow colored glass lens front filters for apertures over 80mm.The filter is tuned to the 0.8-0.6 bandwidth of the 656nm hydrogen-alpha wavelength with the ability to tune it 0.5 from the center line for compensate for Doppler shift or to focus on specific regions or features, with indicators every 0.1 . Prominences, a detail of the chromosphere projected against the blackness of space behind the sun, are seen with improved contrast due to the filter's narrower bandpass versus a wider bandpass filter tuned for conventional chromosphere surface viewing. 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.The Camera Quark comes with a combination lens foot with 1/4-20 tripod holes to mount it on conventional photo/video/field tripods, and a Vixen-style dovetail plate for telescope mounts. While a focal extender spacer ring is included to ensure compatibility with a wide variety of lenses, focus and clearances are not guaranteed with all Nikon F lenses. Because there is no electric pass-through on the filter, when installed between the camera body and lens, some lens features such as auto-focus and electronic aperture control will not work.Filter Properties Hydrogen-alpha bandpassIntegrated 12mm blocking filter20mm clear etalon apertureTuned to 0.8-0.6 for viewing prominencesTuning knob allows for 0.5 wing shift for Doppler-shift compensationMarkers at every 0.1 for reference and repeatabilityLED indicators for power, warming, ready, and faultOptics Integrated 4.2x Barlow lensLens and optical coatings designed specifically for 656nm H-alpha wavelengthTwo-element telecentric lens design keeps light waves parallel to flatten the field of view and reduce parallax as magnification increasesCamera/Lens Compatibility Front and rear bayonet mounts for Nikon F cameras and lensesFull disk viewing possible on lenses up to ~450mm focal length lensesIncludes focal extender spacer ring to ensure compatibility with a wide variety of lensesNo electric pass through on filter so lens features like auto-focus and electronic aperture control will not workFocus and clearances not guaranteed for 100% of lensesUse of red, orange or yellow colored glass lens front filters recommended1.25" eyepiece adapter to use conventional astronomical eyepieces and convert lens into solar telescopePower 5 VDC, 1.5A micro-USB port90-240 VAC wall adapterSet of international outlet plugs for US, UK, EU, and AustraliaMounting Reversible combination lens foot1/4"-20 tripod holes for use with standard photo, video, or field tripodsVixen-style dovetail plate for use with telescope mounts