Lunt Solar 60mm Double Stack Solar Telescope - B1200 - 2" Feather Touch Focuser

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Lunt Solar 60mm Double Stack Solar Telescope - B1200 - 2" Feather Touch Focuser
$3,099.00
Item # LS-60THAD/B12F
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  • The Lunt Solar Systems LS60THaDS50 Hydrogen-Alpha Refractor Telescopeis a custom designed 60mm singlet refractor with a focal length of 500mm.
  • The LS60THaDS50/B1200FT model has a 60mm internal etalon and a 50mm unobstructed external etalon. This model also has an upgraded Feather Touch Focuser.
  • The Lunt Solar Systems LS60T Hydrogen-Alpha Refractor Telescope includes a 12mm blocking filter that provides a ~4.5mm solar image within a larger tuned area than that of the 6mm blocking filter .
  • Use the Lunt double-stacked LS60T in single stack mode for prominence viewing or in double-stack mode for surface detail! Recommended for binoviewing and imaging.
Description

Details

Lunt Solar Systems LS60THADS50 Hydrogen-Alpha Refractor Double Stack Telescope

Now introducing the Lunt Solar Systems Double Stack LS60THaDS50 Hydrogen-Alpha Refractor Telescope. At its heart is the custom-made 60mm aperture precision aligned singlet lens. The focal length of the Lunt LS60 double-stacked solar telescope is 500mm, providing a ~4.5mm image through a 12mm blocking filter - far superior to a 6mm design. This model comes with the upgraded Starlight Instruments 2" Feather Touch Focuser with 10:1 reduction and 2.5" of travel.

Lunt Solar Systems LS60THADS50 Hydrogen-Alpha Refractor Double Stack Telescope Highlights

  • The Lunt LS60THADS50 will be double-stacked from the factory.
  • The Lunt LS60TDS50 will utilize a 60mm unobstructed internal etalon and a 50mm unobstructed external etalon.
  • With two factory-matched etalons, you will have a versatile system that can be used single-stacked for prominence viewing, and double-stacked for observing surface detail of the Sun.
  • Single stack mode will achieve a bandpass of <0.8A.
  • Double stack mode will have a <0.55A bandpass.
As experienced solar observers know, it takes less than 1.0 angstrom to be able to see any detail and considerably less to see striking contrast - especially on the ever changing prominences. The reduction in bandpass from an estimated 0.8 Angstroms to 0.5 Angstroms seems to bring the Sun's surface to incredible life, but getting those spectacular results by double stacking are more difficult than they sound. Both etalons need to be brought on line (tuned) and both need to be tiltable so that all ghosts are eliminated. Ideally the transmission curves should overlap perfectly when on band to provide for the best possible resolution and contrast. These hurdles can be overcome by matching the etalons at the factory.

Lunt Solar Systems creates their line of h-alpha solar telescopes in Tuscon, Arizona. They have have put together a group of experienced solar enthusiasts who are looking forward to energizing the hobby with a continued commitment to advancing technologies, pride in quality, and the highest level of customer care. These are names you'll recognize, including Andrew Lunt with 20 years of optical design, Markus Ludes with his extensive knowledge of telescope design, Manny Serrano as a design engineer and Brian Stevens assembling, repairing and troubleshooting etalon systems. And newly designed etalon systems are what it's all about.... Some of their new products will range from an entry level 50mm etalon filter through to a 160mm Lunt Solar Telescope System using different components... One that's less thermally sensitive and far less prone to de-contacting.

Lunt Solar Systems LS60T Hydrogen-Alpha Double Stack Refractor Telescope Features

  • Factory Matched dual etalon system
  • Use of unobstructed etalons.
  • Infra-red deflecting window to eliminate unwanted heat.
  • Optimized collimating system for true collimation, coma correction and off-axis reduction.
  • Stylized pearl white paint with black anodized trim.
  • Induced Transmission Filter for long term safety, durability and performance.
  • Full warranty from Lunt Solar Systems.
Lunt Solar Systems Product Number: 60THAD/B12F
Additional Information

Additional Information

SKU LS-60THAD/B12F
Solar Instrument Type Telescope
Aperture 51mm - 70mm
Emission Line H-Alpha
Manufacturer Lunt Solar
Warranty 5 Year Warranty
Blocking or ERF Aperture 12mm
Bandwidth <0.55 A
Telescope Focal Length 500mm
Telescope Focal Ratio Not supplied by manufacturer
Tuner Included? Yes
Length of Optical Tube 18.11"
Optical Tube Weight 8.15 lbs.
Reviews

Customer Reviews 1 item(s)

Quality, inside and out
Everything about the Lunt B1200 Imaging Package (60mm Pressure Tuner version w/ Double Stack and 2” Crayford Focuser) says quality, from build quality to image quality to accessories and packaging to aesthetics. First and foremost, an H-Alpha scope should deliver a superb solar image, and the Lunt 60mm does not disappoint, either alone or with the second, stacked etalon. Prominences are razor sharp against the solar limb, and with a little tuning solar granulations, sunspots, plages and filaments reveal intricate detail. One of the discoveries that one soon makes is that it isn’t necessary to have a heavy sunspot day to enjoy solar observing – filaments are often visible even when sunspots are not. The pressure tuner makes this easy, although the amount of torque required can cause the Sun’s disk to wiggle a little on a less than sturdy mount. When one has completed a session it is best to back off the tuning knob in order to relieve the pressure chamber, else one will eventually run out of inward travel. However, don’t back off too far else the knob will come off!

Some solar scopes reviewers have questioned the utility of a second, double-stacked etalon. For me, installing the second etalon on the B1200 unquestionably improves the image, and not by a trivial amount. The double-stack image is slightly darker but contrast is much enhanced and more detail is revealed at higher magnifications. (Potential buyers should be aware that the aperture of the second etalon is only 50mm, theoretically resulting in a loss of resolution compared to the 60mm aperture of the scope’s objective lens. However, in practice this is more than offset by the enhanced contrast resulting from the narrower H-alpha peak created by the second etalon.) Either way, the optics will deliver outstanding images to a good planetary camera.

The scope itself is nothing short of a work of art in terms of design, fit and finish. The scope is a thing of beauty sitting on a mount, waiting for a viewer to partake. (And, since most of my other refractors are white, the Lunt fits right in!) I passed on the Lunt eyepieces, using instead TeleVue 24mm and 19mm Panoptic eyepieces as my primary solar viewports. The Sol-Searcher Sun finder is a critical accessory and works exactly as advertised. The 2” Crayford is simply a delight to work with, allowing one to arrive precisely at superbly crisp images. The dovetail plate mounts directly into a number of commercial mounts and it bolts to the sliding bar of my equatorial mount for photo sessions.

There is one cautionary note that should be remembered when handling the Lunt scope. The back of the second etalon is threaded and is thus designed to screw into the front of the main scope which is correspondingly threaded to receive it. But, both the front black ring fitting of the main scope and the corresponding rear fitting of the double stack unit are simply screwed into their respective optical tubes. If the second etalon is attached too tightly to the main scope during installation it is possible for one to unscrew the front element of the main scope or the rear element of the double stack etalon when one is attempting to decouple the second etalon from the main scope. If one doesn’t notice this happening one can expose internal parts not intended for disassembly.

The Lunt 60mm B1200 Imaging Package is not inexpensive but it is a quality product and it produces superb images. It is also lightweight and very portable, which was the final factor in my decision to purchase this scope over other, larger models.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by Old School / (Posted on 1/15/2014)
Included Items

Included Items

  • LS60 Ha Double Stacked Telescope System with a 12mm Blocking Filter
  • 2" Feather Touch Focuser
  • Clam Shell with mounting holes, accepts Tele Vue Sol Searcher Finder (sold separately)
  • Re-enforced case with foam
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