DayStar Filters Camera Quark H-Alpha Solar Filter for Nikon (Prominence)

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 SLR and DLSR 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 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 bandpass
• Integrated 12mm blocking filter
• 20mm clear etalon aperture
• Tuned to 0.8-0.6 & for viewing prominences
• Tuning knob allows for ± 0.5 & wing shift for Doppler-shift compensation
• Markers at every 0.1 & for reference and repeatability
• LED indicators for power, warming, ready, and fault

Optics

• Integrated 4.2x Barlow lens
• Lens and optical coatings designed specifically for 656nm H-alpha wavelength
• Two-element telecentric lens design keeps light waves parallel to flatten the field of view and reduce parallax as magnification increases

Camera/Lens Compatibility

• Front and rear bayonet mounts for Nikon cameras and lenses
• Full disk viewing possible on lenses up to ~450mm focal length lenses
• Includes focal extender spacer ring to ensure compatibility with a wide variety of lenses
• No electric pass through on filter so lens features like auto-focus and electronic aperture control will not work
• Focus and clearances not guaranteed for 100% of lenses
• Use of red, orange or yellow colored glass lens front filters recommended
• 1.25" eyepiece adapter to use conventional astronomical eyepieces and convert lens into solar telescope

Power

• 5 VDC, 1.5A micro-USB port
• 90-240 VAC wall adapter
• Set of international outlet plugs for US, UK, EU, and Australia

Mounting

• Reversible combination lens foot
• 1/4" -20 tripod holes for use with standard photo, video, or field tripods
• Vixen-style dovetail plate for use with telescope mounts

EAN: 724696425755