Similar to their standard Quark, Daystar Filters designed the Combo Quark H-Alpha Eyepiece Solar Filter for use with f/15 to f/30 refractors, Schmidt-Cassegrain, or Maksutov-Cassegrain telescopes. For those who use off-axis energy rejection filters (ERFs) a 2° off-axis snout adapter is included for proper light-path alignment to ensure the correct filtration and produce the best images.

This all-in-one hydrogen-alpha filter is engineered to eliminate unnecessary components which reduced the size and weight, and enabled it to fit in a compact form factor that simply inserts into 1.25" or 2" diagonals and accepts 1.25" eyepieces. This design enables the use of nighttime telescopes for solar viewing. It is tuned specifically for viewing prominences. 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.

While there are no OTA aperture limitations, Daystar recommends the use of front-mount energy rejection filters. On Schmidt OTAs aperture-reducing off-axis ERFs are recommended, while Maksutov or refractors can be used with full-apertures ERFs. 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.

656nm H-Alpha Filter with 25mm Blocking    Tuned for Prominence Viewing    Use Astronomical OTAs for Solar Viewing    ±0.5Å Wing Shift Tuning    Use with SCT, Maksutov, F/15 Refractors    No OTA Aperture Limitations    5 VDC, 1.5A Micro-USB Port    Off-Axis Wedge Adapter Included    Optional ERFs Required

• Hydrogen-alpha bandpass
• Integrated 25mm blocking filter
• 19mm clear etalon aperture
• Tuned to 0.8-0.6Å for viewing prominences
• Tuning knob allows for ±0.5Å wing shift for Doppler-shift compensation
• Markers at every 0.1Å for reference and repeatability
• Internal baffles increase contrast
• Optical coatings designed specifically for 656nm H-alpha wavelength
• LED indicators for power, warming, ready, and fault

• 2° off axis 1.25" front adapter for use with off axis Schmidt and Maksutov energy rejection filters
• Fits 1.25" diagonals and drawtubes
• Accepts 1.25" eyepieces
• Brass compression ring to protect eyepiece from scratches

• No aperture limitation
• For use with f/15-f/30 refractors, or Schmidt and Maksutov-Cassegrain OTAs
• Maksutov OTAs with a focal ratio of up to f/15 can be used at full aperture, but must use a front-mount ERF to prevent overheating the OTA
• Schmidt OTAs must use an off-axis aperture reduction ERF
• Full-disk viewing on refractors up to 1800mm focal length
• Not for use with full aperture Schmidt-Cassegrain OTAs - damage to secondary mirror may result

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

Related Questions and Answers

Q: 1. So if you're going to use it on a Canon R6 you'd need two adaptors?

A: All you would need is the Vivitar T-Mount to Canon RF-Mount Adapter. Link to Item: https://bhpho.to/2R13gQg

Q: 2. Will this work on an Orion Astroview 120ST (600mm, f/5)? If so, will I need any additional adapters or extension tubes (for focusing)? Thank you.

A: The DayStar Filters QUARK H-Alpha Eyepiece Solar Filter (Prominence) BH #DADSZ4P • MFR #DSZ4P simply inserts into 1.25" or 2" diagonals and accepts 1.25" eyepieces. This design enables the use of nighttime telescopes for solar viewing. In addition to the tunable H-alpha filter, the Quark also functions as a 4.3x Barlow lens, with a 2-element lens system designed to be telecentric which flattens the field of view and reduces parallax, and optical coatings that are optimized for the 656nm H-alpha wavelength.

Q: 3. I Have An F7 102mm Triplet Refractor From Explore Scientific, If I Purchase This HA Solar Filter What Else Would I Need To Purchase

A: The DayStar Filters QUARK H-Alpha Eyepiece Solar Filter inserts into 1.25" or 2" diagonals and accepts 1.25" eyepieces. I recommend using UV/IR cut filters. Follow this link https://bit.ly/3UpqtKg if you are using a diagonal, or https://bit.ly/494r2gU if you are not. The following energy rejection filter is also recommended for optical tube assemblies over 80mm. https://bit.ly/3vYBecc

Q: 4. Can I use this with newtonian telescope using off axis reduction?

A: For the DayStar Filters QUARK H-Alpha Eyepiece Solar Filter (Chromosphere) BH #DADSZ4C • MFR #DSZ4C simply inserts into 1.25" or 2" diagonals and accepts 1.25" eyepieces.

Q: 5. DayStar Filters Camera Quark H-alpha Solar Filter for Canon (Prominence): Does this provide product adequate filtration of the sun for the upcoming eclipse, or does it need to be used in consort with additional filters on camera/scope for viewing?

A: The DayStar Filters Camera Quark H-alpha Solar Filter for Canon (Prominence) goes between your lens and camera. You still need a ERF (energy reflecting filter) on the front of your lens. This will prevent damage to the lens. For help choosing a ERF (energy reflecting filter) for your lens email us at sportoptics@bandh.com.

Q: 6. What size should I get for Canon 70-200?

A: If you go to Daystar website or call them on the phone, I think that is where I read that if you have the 77MM pro lens, meaning it is 77MM in diameter then get the 65 - 89 Solar filter. I have the 70-200 F2.8 non IS lens. I did not put it on yet.

Q: 7. I have a 24-120 mm using a 77 mm filter. The lens hood diameter is 110 mm. Should I use the lens hood during the eclipse?

A: It is a matter of opinion but I would recommend using the hood always. Even if the sun is directly in the frame and the hood cannot stop the flares, the hood still provides safety protection in case the camera is dropped. Since the Daystar filter is not large enough for the hood, this screw on ND filter can be used for solar protection instead: https://bhpho.to/2m7h8oX

Q: 8. Is this compatible with Nikon z or Nikon F ?

A: The DayStar Filters Camera Quark H-Alpha Solar Filter for Nikon (Prominence) will work with Nikon F mount lenses,

Q: 9. Can I use this to take photos of the sun for practice of the upcoming solar eclipse?

A: Yes. The DayStar Filters 70mm White-Light Universal Lens Solar Filter can be used for solar photography with or without an eclipse.

Q: 10. What do I need to use this with my Canon 5D M4?

A: This is to fit Canon SLR and DLSR bodies. You do not need anything extra for a Canon EOS 5D Mark IV.