Lunt Solar Systems LS40THa Manual


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Manual
LS40THa H-alpha Solar-Telescope
Telescope for solar observation in the H-Alpha wavelength. The H-alpha wavelength is the most impressive
way to observe the sun, here prominences at the solar edge become visible, filaments and flares on the
surface, and much more.
Included Contents:
- LS40THa telescope
- H-alpha unit with tilt-tuning
- Blocking-filter B500, B600, or B1200
- 1.25 inch Helical focuser
- Dovetail bar (GP level) for installing at astronomical mounts
- 1/4-20 tapped base (standard thread for photo-tripods) inside the dovetail for installing at photo-tripods
- Sol-searcher
Please note: Please keep the foam insert from the delivery box. The optionally available transport-case for
the LS40THa (item number 0554010) is not supplied without such a foam insert, the original foam insert
from the delivery box fits exactly into this transport-case.
Congratulations and thank you for purchasing the LS40THa telescope from Lunt Solar Systems! The easy
handling makes this telescope ideal for starting H-Alpha solar observation. Due to its compact dimensions it
is also a good travel telescope for the experienced solar observers.
Safety Information:
There are inherent dangers when looking at the Sun thru any instrument. Lunt Solar Systems has taken your
safety very seriously in the design of our systems. With safety being the highest priority we ask that you read
and understand the operation of your telescope or filter system prior to use. Never attempt to disassemble
the telescope! Do not use your system if it is in someway compromised due to mishandling or damage.
Please contact our customer service with any questions or concerns regarding the safe use of your
instrument.
Never look at the Sun with your naked eye or with a telescope that is not specifically designed to do
so. Permanent and irreversible eye damage may result!
Never leave the solar telescope unsupervised while pointed at the Sun. People who are not familiar
with the correct operating procedures of the system may inadvertently replace the diagonal or
remove the filter itself not being aware of the integrated safety features of each.
The Lunt Solar Systems telescopes are not interchangeable with competitor products.
A Lunt Solar Systems solar telescope houses many optical elements that are all pre-aligned and fixed at the
factory. There are no user serviceable parts inside the scope. The telescope should never be taken apart.
This will not only void your warranty leading to costly repairs, it can only serve to further damage the
instrument and compromise its safety.
Most Lunt Solar Systems filters and telescopes house a delicate optical element referred to as an Etalon.
These Etalons are suspended in the system housing in an effort to both protect it and isolate it from outside
influences, which could de-tune the Etalon filter. Extensive research has been done to assure the best
performance of what is essentially the "heart" of the system while protecting it from the day-to-day bumps,
jarring, and vibrations of normal use. However, the instrument should never be subjected to shock due to
being dropped. Mishandling of the filters system will cause the Etalon to de-contact (not covered under
warranty) and will render the instrument useless until repaired.
The instrument should be stored in its original box, or in the optionally available transport case item number
0554010. As with any precision optical instrument it should be kept in as low a humidity area as possible.
With proper handling and care the filter should last a lifetime.
2
Okay let's get started...
Safety First!
- Always check any telescope before use for solar observing. Do not use any telescope or filter that
appears to be damaged. Verify that all glass and filters are in place.
- The Blocking Filter diagonal must always be used with the LUNT telescope or filter for solar
observing.
Install the LS40THa telescope on a astronomical mount or on a photo tripod.
Pull the blocking-filter diagonal out of the focuser by about 15mm and then tighten the clamping screw on
the side of the focuser.
First use an eyepiece with around 25mm focal length to have the largest possible field of view. Point the
telescope at the sun by using the sol-searcher. There is a small hole in the front of the sol-searcher, which
projects the sun onto the back of the white ground. When the sun is visible in the center of the white ground,
look through the eyepiece. Do you see a fuzzy round red ball? If not, make sure you have removed the dust
cap from the front of the telescope. After some trial and error the Sun should appear in the eyepiece.
Focus: It is amazing how many people walk up to a solar telescope and take a quick look thru without ever
focusing. Course focus is achieved by moving the diagonal drawtube in and out. Fine focus is achieved by
the Helical focuser. Focus so that the edge of the Sun is as sharp as possible.
Tuning: On the filter housing installed at the telescope front, there is a small
wheel, half embedded in the tube. Move the wheel all the way to the left, do not
move it too much against the stop! While looking through the telescope, slowly
turn the wheel to the right. After a few turns, you should see prominences at
the edge of the sun, and structures will also become visible on the surface. If
the wheel is turned too far, the prominences and other structures disappear
again. Turn the wheel back again in the other direction until the prominences
are at their most contrasting. When the most detail is visible, you have tuned
the system to the H-Alpha wavelength of 656.28nm. Once set (tuned), you do
not need to change the setting during observation.
The Etalon of the LS40THa is tilted rather quickly as you turn the wheel. Therefore, turn this wheel very
slowly to avoid missing the optimal tuning point.
Re-Focus: When you feel you have tuned effectively, re-focus the telescope. The finer details should come
into view. Try to relax the eye while observing and let the details come to you.
Change the eyepiece: When you have a good feel for observing at lower magnifications try to increase the
magnifications in small steps. Place an interesting artifact in the center of the field, for example a
prominence. Replace the 25mm with a 8 - 12mm eyepiece. Look thru the eyepiece and re-focus carefully.
The image has dimmed slightly due to higher magnification but the details should be easier to see. You can
push the magnification as seeing conditions allow.
Seeing conditions: Please note that seeing conditions can affect the performance of your telescope in H-
alpha wavelength. Cloud cover, wind, humidity, and air turbulence caused by heat play a major role and can
complicate the observation of details.


Produkt Specifikationer

Mærke: Lunt Solar Systems
Kategori: Kikkert
Model: LS40THa

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