"Optimised to perfection
The small wait for each filter to get to temperature fills you with anticipation and your eventual opportunity to look through the eyepiece or via a camera certainly doesn’t disappoint.
Despite the diminutive (in hydrogen-alpha terms) price tag, both models perform impressively. The chromosphere-optimised version shows plenty of fine detail, from dark fibrils, filaments and plage to intricate magnetic maelstroms surrounding active regions. Despite its optimisation, this version can also show limb detail including prominences and the short-lived jets of gas known as spicules. The field of view has great contrast and is without gradients or noticeable sweet spots.
Switching from the chromosphere to the prominence model delivers a whole new experience. Seeing prominences via the chromosphere filter leads you into the false sense that the prominence filter view isn’t going to be that much better. However, it is. Prominences appear bright and detailed against a jet black background sky again with no sweet spot issues." BBC Sky @ Night Magazine
About this product
Part Number: DSZ4C
DayStar Quark Hydrogen Alpha 'Eyepiece'
This new, all-in-one design marries high quality components of a telecentric barlow, adapters, snouts and Daystar hydrogen alpha filter into one simple assembly. Through design efficiency and optimisation, now users can enjoy the known high quality optics of DayStar* at an affordable price.
For use on refractors of F/4 to F/8**. The user needn't worry about configurations. Just insert in your diagonal, add an eyepiece and view.
The patent pending QUARK* contains a custom Daystar Instruments 4.2X telecentric barlow lens fully optimised in coatings and optical design specifically for the Hydrogen Alpha wavelength. This highly specialised telecentric lens offers superior field flatness.
Exact filter bandpass will vary based on final telescope application, so QUARK* assemblies are qualified to show either prominence or surface (chromosphere). No specific FWHM bandpass is designated. Now observers can buy a filter based on their desired observing goals instead of their budget. Choose prominences or surface (Chromosphere) detail. Both are available for the same low price!
The fully optimised design eliminates the need for adapters. It is all combined in one lightweight eyepiece-sized device. The new, compact design configuration eliminates unnecessary components, weight and associated costs. We even reduced power consumption, so the Quark* can now operate all day off a small, palm-sized optional battery pack.
Baffles have been added to increase contrast and AR coatings are optimised for the 656nm wavelength.
Important: To prevent damage, we recommend using an Energy Rejection Filter on telescopes of 80mm aperture or more, or when tracking the Sun for long periods. This can be a UV/IR cut filter mounted before the diagonal, or a full aperture red or yellow glass ERF mounted in front of the telescope.
- 1.25" or 2.0" combo eyepiece snouts with safety indent slot directly into your diagonal
- Standard 1.25 eyepiece drawtube output with optional 2" and SCT accessories available.
- Brass compression ring to protect eyepiece.
- Uses USB power, 5v 1.5amp
- Includes 90-240VAC wall adapter with international plug adapters.
- Tuning knob allows wing shifting +/- 0.5Ã… with detents at every 0.1Ã…
- LED indicator for power, warming, ready, fault
- 5 year warranty,
- Optional 8-hour battery pack available.
- Integrated, fully baffled 2 element telecentric 4.2X barlow optimized for 656nm
- Integrated 12mm blocking filter
- 21mm clear filter aperture
- Best performance with F/4 - F/8 refractors
- Full disk viewing possible on refractors up to ~450mm focal length refractors
- No aperture limitations. May be used on larger refractors for higher magnification views
- Ships in convenient Twist-Case for safe, dust-free storage.
- Not suited for off-axis application
*The QUARK* assembly is a product of DayStar Instruments, using DayStar Filters' Fabry Perot etalon technology.
** QUARK Filters may be used at shorter and longer focal ratios than recommended. F-ratios of F/9 and higher will offer a dimmer visual view and may only be bright enough for photographic applications. F-ratios of less than F/4 will be brighter, but also widen the effective FWHM bandpass performance of the QUARK filter.
What's in the box
- Quark Eyepiece
- 1.25" Eyepiece Drawtube
- Wall Power Adapter
- USB Power Cable
|Average Rating (2 Reviews): |
Monday, 25 May 2020 | Stephen
got to use the quark chromosphere today for first light.
It's riding on an ED80 and Solar Quest mount. Instead of the UV/IR cut filter I opted for the Baader 35nm filter as advised by members on SGL. The view was amazing. I spent some time changing the tuning. I found the 0 gave me the best surface detail and -3 the best contrast for proms. Overall I'm delighted. On the solar quest I bought it used and it holds the ED80 and the quark and the rest of the stuff easily. I put a prom in the center of the FOV and it stayed there for the whole 2:30 session whilst experimented with settings.
Thursday, 14 May 2020 | Rodger
First thanks again to all at FLO for a safe and fast delivery.
Well packaged and undamaged
The Quark itself comes in a plastic screw down case so will always be protected, the cable is very long so should easily reach the Quark in normal situations.
As usual as soon as it arrived the clouds jumped out of the box and into the sky, there is also very little activity on the sun.
Tried it for an hour today in between clouds and it is brilliant. Black sky and bright sun. The couple of minor prominences stood out easily, trying my friends chromosphere version the same proms were not visible (on very similar scope)
The product itself is well designed and sturdy with no noticeable flex or wobble in the star diagonal, the cable holds well and shows no sign of trying to come loose.
Using a 21.5 to 10mm solar eyepiece at 21.5mm the full disk is just visible on a WO71 (400mm) 30mm eyepiece would be better for full disk.
Closing down to 10mm reduces light significantly from very bright to quite dim but still gives excellent views.
If you are interested in general solar viewing then the Chromosphere version is the one to get, however first impressions are that this by far out performs it when it comes to Prominences..
The other thing to note is that there is no sweet spot with even illumination all round - fantastic
The 10 min wait between band shifts is an advantage, going from full left to full right is about 10 mins but if you keep viewing during this change you can see features come and go. So gives you a good idea on which bands to try next.
Just have to wait now for a clear day and pop a camera on it.
All in all for its price point 110%
Clear skies and stay safe
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