Overview of the DSII Hydrogen-alpha Pressure Tuned Module
The LS100T/DSII is an upgrade to the standard LS100T Solar Telescope. The DSII contains a specially designed re-
collimating and refocus lens set that will only work in the LS100T. The DSII contains a precisely tuned narrowband
interference filter in a sealed cavity. This filter will reduce the band pass of the LS100T to approx. 0.5 Angstroms. The DSII
utilizes our advanced pressure tune technology, allowing for easy tuning of the finest details.
The LS100T/DSII module is designed to provide enhanced surface detail, allowing for higher contrast views of the filaments
and active regions. Some dimming of the prominence (edge) details will be noted due to the narrowing of the band pass
and the dimming of these features.
What is delivered with the system?
A DSII pressure tuneable module.
6 aluminum thumbscrews for easy installation and removal.
Shipping box with die cut foam insert.
A warranty card. Please fill out and return to activate your warranty.
Instruction manual.
What accessories are recommended?
Eyepieces. Simple eyepieces with narrow field of view are recommended. (25mm thru 8mm)
A second focuser for the DSII if the user intends to view in single and double stack mode often.
Sun block, a Lunt Solar hat, and a nice comfortable light colored chair.
Warning:
The DSII can
only
be used as a secondary filter system for the LS100THa/PT scope. The DSII contains
NO
filtering of the
IR or UV wavelengths, and relies on the safety features of the main LS100THa/PT to do this task.
NEVER attempt to use the DSII in any other telescope
.
Okay let's get started...
Safety First!
·
Always check any telescope or filter before use. Do not use any telescope or filter that appears to be
damaged. Verify that all glass and filters are in place. Contact Lunt Solar with any questions before use!
·
The Blocking Filter diagonal must ALWAYS be used with the Lunt Telescope or Filter. Lunt Filters and
Blocking Filters are NOT interchangeable with products from other vendors.
So you have your LS100THa/PT setup on a tripod or mount. Let's take a look!
Place a 21mm eyepiece in the focus end so you have the largest field of view to look at.
Pull the diagonal slide tube out about 25mm.
Put the focus tube at about 50% of travel.
Align the Sol Searcher.
If you do not have a Sol Searcher you can use the shadow cast by the Sun on the front objective cell against
the clamshell. Center one on the other and you should be close.
Look thru the eyepiece. Do you see a fuzzy red ball? If not, make sure you have removed the dust cap from
the front. Try to re-align the Sol Searcher and look again. After some trial and error the Sun should appear in
the eyepiece. Once the Sun is centered now is a good time to adjust that Sol Searcher.
Focus: I am amazed 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. Medium focus is achieved
using the larger silver knobs on either side of the focuser assembly. Fine focus is achieved with the 10:1
reduction (smaller black knob). The fine focus is often too fine for visual use, but comes in very handy if you
are imaging. Focus so that the edge of the Sun is as sharp as possible.
Tuning: On the side of the scope is a large black cylinder. This cylinder is the tuning system for the
LS100THaPT. We will explain how it works later, but for now we will simply describe how to bring 656.28nm
wavelength on band. The black handle of the cylinder system has a 4 start thread attaching it to the brass
Lunt Solar Systems * 2520 N. Coyote Dr. #111 Tucson, AZ 85745 * (520) 344-7348
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