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Stephen Ramsden’s Corner
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Image of the week
Here is the Solar Image of the Week.
Thanks to: Howard
Lunt Solar CaK Filter
A very nice image from Florida.
Real Time Images: The Very Latest from SOHO
Lunt Solar Image Gallery
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Ha Solar Filters
HA Solar Telescopes
Optical Tube Assemblies
Lunt Solar Imaging System (LSI)
Clamshell Mounting Ring - LS60/LS80
The Sun is our Star!
.......and as you would expect, our Star is hot, bright, dynamic, and sometimes quite violent.
At 93 million miles away, we are ideally placed at a point where the Sun provides just enough warmth and energy essential to our living planet, Earth.
At only 93 million miles, the Sun is close enough for us to view its surface through a fairly inexpensive specialized scope from the comfort and relative safety (sunscreen, please) of our backyards on a clear and sunny day.
What! Astronomy during the day? Lunt Solar wants to show you how.
These look like eruptions from the edge of the Solar disk. Prominences can appear as small spiky-looking details, or large cloud-like detail with fine feather-like features. They are, in fact, ionized Hydrogen-alpha emissions being projected from the limb.
Prominences are anchored to the Sun's surface in the Mesosphere, and extend outward into the Sun's Troposphere. They typically measure many earth diameters.
Filaments are string-like features on the surface of the Sun. At high resolution they take on a 3D effect due to the cooler aspect of the suspended filament contrasted against the bright, hotter Sun.
Filaments are actually prominences being viewed against the surface.
A Spicule is a dynamic jet of gas about 500km long. They move outward at about 20km/second through the Chromosphere.
Father Angelo Secchi of the Vatican Observatory discovered them in 1877.
The Chromosphere is entirely composed of Spicules. These features can be seen as "fur" around the edge of the disk.
There's definitely stuff to look at :)
The Lunt Solar Systems LS100THa is a complete solar telescope. The refractor based system has a precision-aligned singlet chromatic lens with a 100 mm aperture. The front singlet lens reduces the stray light over an achromat by half. With the matched collimation lens set, it also fully corrects on axis coma, astigmatism and de-centering aberrations and provides a full spherically corrected flat-field solar telescope. The focal length is 800 mm, providing a ~7.3 mm image thru a 12 mm blocking filter. Course focus adjustment is via a slide tube. Focusing is achieved with a High Precision 2″ Starlight Feather Touch Friction focuser with the a 10:1 reduction as standard equipment. An internal etalon with tune adjustment allows for a <0.7 Angstrom bandpass.
True Doppler Tuning allows for a shift into and away from the user. Adding a 3D like component to the viewing experience. While it has minimal effect on proms due to their location at the edge of the disk, it does have an effect on filaments and active regions on the surface. While looking at a filament at the center of the Sun, the user has the ability to Doppler shift from the base of the filament to the tip, following the filament through it’s structure toward you and away from you, allowing for enhanced visual and imaging capability for the observer as well as a research tool for the avid hobbyist. The pressure tuning system provides an order of magnitude more precision to the tuning of the desired features.
Additionally, the system may also be purchased with the 100mm external, front mounted Double Stack Etalon LS100FHa for a bandpass of <0.5 Angstrom, or the LS100THa DSII Internal Double Stack Module (DSII/LS100T). See below for more information.
LS100THa Specifications: (single stacked)
- Optical Aperture: 100mm
- Etalon: Internal <0.7 Angstrom
- Tuning: Internal Pressure Tune (Doppler True Tuning)
- Focal Length: 800mm
- F Ratio: F/7
- Focuser: 2″ Feather-Touch focuser with 10:1 reduction
- Tube diameter: 121mm
- Tube length with blocking filter: 634mm
- Storage: Aluminum finished hard case with fitted foam
- Weight: 12.2 lb.
Included Accessories: (see “accessories”)
- Optical tube with 2″ feather touch focuser with 2.5″ travel,
- B1200, B1800 or B 3400 Blocking Filter
- Sun Finder: Televue Sol Searcher
- Mounting: Lunt 12″ Dovetail
- Case: Aluminum Finished Hard Case with Custom Foam
The LS100THa is available in several variations. Below is a list of options and their prices:
LS100THa (no blocking filter)
*Standard system with 2″ Feathertouch Focuser for external double-stacking. If used singly, requires blocking filter, which is sold separately.
Retail Price: $3999.00
* Standard system with B1200 blocking filter and 2″ Feathertouch Focuser
Retail Price: $4,647.00
* Standard system with B1800 blocking filter and 2″ Feathertouch Focuser
Retail Price: US$4,997.00
* Standard system with B3400 blocking filter and 2″ Feathertouch Focuser
Retail Price: US$5,797.00
Customer Solar Images:
- Pawel Rojewski
- Savio Fong
- Jim Lafferty
- Derek Klepp
- Teri Smoot
- Stephen Ramsden
- Eduard Garcia Ribera
- Your Image Gallery here?
For more images visit the Lunt Solar Image Gallery
No-one brings you closer to our nearest Star than Lunt Solar Systems… the next generation of Solar Instrumentation.
About Lunt Solar Systems LLC…
Lunt Solar Systems is a manufacturing and sales facility located in Tucson, Arizona. Lunt Solar design, fabricate, assemble, and test solar telescopes and solar filters. Whether you are looking for a dedicated solar telescope or a solar filter for attachment to you own astronomy telescope, we can help. Solar telescopes models start at $598 for an LS35T (telescope) or the only slightly more expensive LS50F (filter), all the way thru the 152T and the 160F. Solar observing is both fun and educational. Don’t miss out on Solar Maximum.