Meade CORONADO P.S.T. User manual

P.S.T.®Personal Solar Telescope
Hydrogen-Alpha Solar Telescope

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WARNING!
Looking at the Sun can be very dangerous unless the proper precauons are taken and
specialized solar viewing equipment, like Coronado Solar lters and telescopes are
used. Never look at the Sun directly with your eyes. When using Coronado lters on
a telescope not designed specically for solar viewing, be sure to block all non-ltered
opcal components such as viewnders to prevent the suns light from passing through. An inadvertent
glance thought an unltered or improperly ltered opcal system can cause immediate and permanent
damage to the eye. Never allow unaended children to operate or be near a solar telescope system.
Coronado hydrogen-alpha telescopes and lters are designed and tested to provide safe viewing of the
Sun. These systems consist of two crical parts: The etalon lter that may be mounted at the front of
the telescope or internally inside the telescope tube and the blocking lter that is mounted at the back
of the telescope. Both of these components must be properly installed to provide safe solar viewing.
Most Coronado blocking lters (BF lters) are installed in a special diagonal that mounts at the rear of
the telescope and holds the eyepiece. Do not replace this diagonal with any other diagonal. Without the
blocking lter inside the dedicated Coronado diagonal, light from the sun is not fully ltered and looking
through the system can result in eye damage even with a quick glance.
READ THIS MANUAL COMPLETELY BEFORE ATTEMPTING TO USE YOUR
NEW CORONADO PRODUCT. IT CONTAINS SPECIFIC INSTRUCTIONS
REQUIRED FOR THE SAFE USE OF YOUR PRODUCT.

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Meade Instruments has night and day covered for the amateur astronomer. Meade is the leader
in night me astronomy with the most advanced opcal, mechanical and electronic systems
for viewing the night sky. With Coronado and the development of the SolarMax, Meade is the
clear leader in solar day me observing as well. Whether you are imaging deep sky objects with
your Meade astronomical telescope or gazing at our nearest star through a Coronado SolarMax
telescope, keep an eye on the Meade team to provide you with the most technologically advanced
and innovave product to enhance your enjoyment of astronomy. No maer where, or what me
of day your interest in astronomy calls to you, we will be there with you.
Night and Day, we’ve got you covered.

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Table of Contents
About Coronado®..............................................5
Filter Safety ...................................................6
PST Single Stack Telescope ..................................... 7-9
PST Double Stack Telescope ................................... 9-12
Cleaning .....................................................13
Care ........................................................13
Addional Support and Accessories ..............................14
Denion of Terms ............................................15
H-α Solar Features ............................................16
Solar Facts ...................................................17
Troubleshoong ........................................... 17-18
Warranty & Registraon..................................... 19-20

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About Coronado®
Coronado® was founded in 1997 by David Lunt and Geraldine Hogan as Coronado Technology
Group. David Lunt’s 40 plus years experience at the forefront of opcal design and innovaon
translated into patented technology allowing the classical Fabry-Pérot etalon to be
constructed in a novel way. Tremendous demand changed the inial concept of producing a
few hydrogen-alpha (H-α) telescopes a month for the advanced solar amateur. As word got
out that these telescopes and lters produced amazing views of the Sun, Coronado grew
rapidly. As demand vastly exceeded the small company’s ability to produce, the owners of Coronado decided
to sell their operaon to a company with the experience in higher volume manufacturing but sll had then
dedicaon to quality and detail that Coronado was known for. That company is Meade Instruments.
In June of 2010 Meade Instruments announced the introducon of the revoluonary SolarMax II line of solar
observing telescopes and lters. The new SolarMax II was a breakthrough in solar observing with the new
RichView™ tuning system. This patented system allows direct tuning of the primary etalon lter. No other
commercially available H-α telescope can provide the tuning range and accuracy of the SolarMax II. Observers
can now tune for the highest contrast views of acve regions, ares, laments, and other surface detail, or
quickly and easily re-tune for prominences on the solar limb.
We connue to maintain the founders philosophy for building lters — Safety, Quality, and Performance. You
can be rest assured that your new instrument has been hand assembled and tested before being sealed in the
box. In fact, every telescope and lter is eld tested on the Sun so we are condent you can look forward to a
lifeme of fantasc H-α views of our dynamic Sun. If you have any quesons please do not hesitate to contact
us.

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Filter Safety
Safety - It is widely known that there are inherent dangers involved with observing the Sun.
Meade Instruments has always been, is, and always will be, obsessed with the safety of its
products. A proposed new product is not released unl it has been fully proven that it can
be made completely safe for the user. All Coronado instruments are tested and sealed at our
facilies as complete, safe, and working units. Do not aempt to disassemble any Coronado
product, doing so will void your warranty and could compromise your safety. Before each use
make sure your lter does not appear damaged in any way. If you have any doubts please call our customer
support. Meade is obsessed with safety and you should be too.
We recommend you establish a safety checklist for each viewing session, ensuring that all adaptors, lters and
blocking lters are installed and secure before aligning the system to the sun. Make this safety check part of
your observing roune. Never leave a solar telescope unaended.
An addional safety consideraon is exposure to the Sun. Always use sunscreen, and wear a hat and long
sleeved shirt while observing.

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RichView™ tuning ring
for internal Etalon
PST®
Focusing Knob
PST®Personal Solar Telescope

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Congratulaons on your purchase!
Meade Instruments has shipped
your Coronado PST dedicated H-α
telescope fully assembled and
ready for use. Be sure to read the
safety and cleaning instrucons on
page 13 before using your PST telescope. You can
refer to the diagrams below for quesons regarding
the components of your system. Please read these
instrucons in full before seng up your new PST
telescope and contact customer service if you have
any quesons.
Mounng
The threads on the boom of the PST are compable
with any ¼ -20 thread. Most standard photographic
mounts and mounng hardware can be used to
provide a safe, stable, and reliable set up. This is also
compable with piggyback mounng systems.
A vixen-style dovetail rail (#07932) can also be
aached to the boom of the PST using the ¼ -20
mounng threads and allows use of the PST on
mounts with a vixen-style dovetail receiver.
WARNING!
Do not insert your eyepiece unl you have conrmed
that the telescope is securely mounted and all lter
elements aached and secured.
Finding the Sun
The P.S.T.™ has been designed with an internal Sol
Ranger™ Sun spong device. There is a small pinhole
on the front face of the P.S.T.™ body and a small
opaque window on the top, near the eyepiece holder.
When properly aligned on the Sun the pinhole will
let in light that will be projected onto the opaque
glass in the form of a small harmless ball. It is NOT
necessary to put your eye up to the opaque glass.
Best alignment will be found when this ball of light is
near center but it is not always dead center. Adding
a SME-40 with T-Max™ double stacking lter will
obstruct the Sol Ranger- Do not put your eye up to
the opaque glass.
Tuning and Focusing the PST
Because dierent features on the Sun are moving
toward or away from the Earth, their light is Doppler
shied o the hydrogen-alpha line of 6562.8
Angstroms, you will need to adjust the tuning slightly

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to get the best high-contrast views of the features
you want to observe. The PST is equipped with a
tuning mechanism that allows the user to adjust
performance of the solar lter. The purpose of this
adjustment is to compensate for possible detuning of
the lter due to the change in operang condions
(such as barometric pressure that can change with
elevaon changes.) The adjustable tuner is located
right at the end of the opcal tube assembly where
it merges to the rectangular body of the PST, and
is easily recognized by the knurled rubber ring (see
Pg. 7). The minute spectral adjustment of the etalon
lter is accomplished by simply rotang this knurled
ring in either direcon. In most instances the lter
adjustment will not be required – the PST is delivered
properly tuned by Meade engineers. The judgment
about occasional adjustment is made based on overall
image quality and the ability to see the image details
with a sasfactory contrast.
NOTE: The maximum possible extent of a
(relavely ght) rotaon of the adjustable tuner
is approximately 130°. No excessive force should
be applied in an aempt to rotate the knurled
ring further than mechanically allowed. The best
achievable contrast of the image will be found within
the limits of adjustment, and, once such image is
obtained, no further improvement of the image
quality can be gained by forcing the tuner.
In search for a beer solar image, the astronomer
should rst nd the “sweet spot” by appropriately
focusing the telescope using the focusing knob. Once
the PST is appropriately focused, the edge of the solar
disk will appear sharp. However, if, for example, the
prominences are not seen aer the telescope has
been focused, the tuning lever for the internal etalon
may be of help. In this case the knurled ring of the
adjustable tuner should be appropriately turned unl
the sought contrast of the Sun’s chromosphere is
apparent.
Double Stacking
A second etalon for a double stack system will show
increased contrast by narrowing the bandpass to
<0.5Å and provides a spectacular 3D eect showing
increased surface detail. The PST can be double
stacked by adding the Coronado SME-40 double

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stacking lter to the front of the PST. Contact your
Coronado dealer or Meade Instruments directly for
more informaon. Note the SME-40 must be used
with the PST and is not a stand-alone lter.
With the SME-40 double stacking etalon aached to
your PST, adjust the T-max™ lt wheel clockwise unl
the gap of the T-max™ tuner is at a minimum. Rotate
both internal and external RichView™ tuning rings
counter-clockwise against the hard stops. This is the
ideal starng point for the double stacked PST.
Aer the PST is pointed at the Sun and image has
been focused, rotate the external T-max™ tuner lt
wheel in the clockwise direcon. Only adjust the lt of
this tuner unl any internal reecons are posioned
o the image of the Sun and in the least bothersome
posion. With low magnicaon eyepieces, it may be
dicult to remove the internal reecons completely
from the eld of view.
When adjusng the lt on the T-max™ tuner, keep in
mind the least amount of lt used is best as image
quality will begin to suer with excessive lt. You only
need to adjust the internal reecons to the point
where they do not bother your view.
Next, slowly adjust the external RichView™ Tuner
clockwise unl the best contrast is achieved.
Finally adjust the RichView™ tuning ring for the
internal etalon unl the best detail and contrast is
achieved.
Aer these adjustments, you may nd it benecial
to go back and re-adjust the RichView™ tuners again
to make sure you are seeing the best detail possible.
Surface details will generally require one seng,
while prominences will require a dierent seng for
maximum detail.
SME-40 Double Stacking Etalon with
RichView™ Tuning

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RichView™ tuning ring
for internal Etalon
Tmax™ tilt wheel
RichView™ tuning ring
External Etalon unit
PST®
Focusing Knob
PST®Personal Solar Telescope
Double Stacked

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Blocking Filters
The Coronado PST comes with an integrated 5mm
blocking lter. This is built into the PST 1.25” eyepiece
holder. You MUST use this 1.25” eyepiece holder
that contains the blocking lter. You cannot safely
substute another eyepiece holder for use with the
Coronado PST. This would create an unltered system
and deliver light from the Sun that will cause damage
to the eye.
Imaging
Due to its compact design, the PST back focus is
limited. This can make imaging the Sun challenging
when using DSLRs or other equipment requiring long
back focus. Dedicated astronomy cameras, such as
Meade LPI-G Advanced will have no issue reaching
focus and imaging the full solar disk. These cameras
are placed directly into the eyepiece holder similar to
a normal eyepiece and have high frame rates ideal for
solar imaging.
Eyepieces
The best eyepieces for solar viewing are Coronado’s
CEMAX™ contrast enhanced series eyepieces.
Convenonal eyepieces can also be used. An eyepiece
with high-quality an-reecon coangs and/or
with fewer lens elements can help reduce unwanted
internal reecons.
Dark Cloth
One easy way to reduce incidental light from entering
your eye is to use a dark cloth to completely cover
your head and the eyepiece. The inside should
be black but a reecve surface on the outside is
recommended to avoid heat buildup.
Locaon
One of the benets of owning a Coronado solar
observing set up is the portability of the system. For
opmal seeing avoid seng up on heat reecve
surfaces such as concrete or tarmac. Grass, water, or
low trees are your best surroundings for viewing.
PST
Aperture 40mm
Focal Length 400mm
Focal Rao f/10
Bandwidth (Single Stacked) <1 Å
Bandwidth (Double
Stacked)
<0.5 Å
Thermal Stability 0.005 Å/°C
Blocking Full blocking >10-5 EUV to far IR
Etalon Clear-Aperture 30mm

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Cleaning
Should your lter get a build up of loose dirt parcles on any surface use a stac free lens brush to gently
“sweep” it clean. Fingerprints and other residue can be cleaned using a high grade opcal soluon applied to
an opcal ssue. Using a circular moon work from the outside edge in towards the center. As these are hard
coangs you can be rm but do not rub. Finish with an an-stac lens cloth. All of these cleaning items can be
purchased through a camera/telescope dealer. Never use the following items on any secon of your lter.
1. Compressed Air
2. Acetone
3. Anything with acidic properes
4. Any fabric not intended to clean opcal coangs
5. Household cleaners
If you have quesons please contact our customer support.
Care
The telescopes and lters, if used properly, will not degrade with exposure to the Sun’s rays. You may leave
your system set up in the Sun, even tracking the Sun, all day without risk. When your system is not being
used it should be stored in a cool, dry locaon in the foam-lined case it was shipped in and with the included
protecve caps securely in place. In locaons with excessive humidity placing a silica packet in the box is
advised. Provided you do not drop or subject the telescope or lter to rough handling, it will work as well years
from now as it does today. We use hard coangs throughout the system to ensure uniform performance for
years to come. It is safe to carry your lters on airplanes and to pass them through X-Ray machines.

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Addional Support and Accessories
Addional support and accessories are available at hp://www.meade.com/solar/solar-scopes.html. There you
can browse dierent accessories, or download a replacement instrucon manual.
CEMAX Eyepieces - The best eyepieces for H-α observing. These are the only eyepieces built specically to
have their peak transmiance at H-α. Using opmized coangs to enhance contrast and minimize glare, we
have set the standard for the market. Available in 25mm, 18mm, 12mm, and a 2x Barlow, 20mm eye relief, 52
degree FOV. You will see the dierence! Call or see our website for package deals.

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Denion of Terms
Prominences — H-αemissions projecting beyond the limb of the sun, consisting of complex clouds or streamers of ionized
hydrogen above or in the Chromosphere.
Filaments - Prominences seen against the face of the sun, appearing as long narrow dark streamers or diuse dark areas.
Active Region - Active regions are the result of enhanced magnetic fields and appear darker than the surrounding areas
with a roughly circular shape. Active regions show plage, sunspots, and flares.
Plage - Patchy H-αbrightening on the solar disk, usually found in or near active regions, which can last for several days.
These are found in areas of nearly vertical emerging or reconnecting magnetic lines.
Sunspots - Spots of varying size usually consisting of a dark central region (umbra) and a lighter halo consisting of many
short fine fibrils (penumbra).
Flares - A sudden eruption of energy in the solar atmosphere lasting minutes to hours, from which radiation and particles
are emitted.
Chromosphere - An incandescent, transparent layer of gas, primarily hydrogen, several thousand miles in depth, lying
above and surrounding the Photosphere of the Sun and beneath the transition region of the Corona.
FOV - Field of View. This describes, in degrees, the area of sky one can see when looking through the eyepiece.
OTA - Optical Tube Assembly. This is the main body of a telescope.
H-α- A wavelength of light at 656.3nm or 6562.8 Angstroms (1nm = 1 billionth of a meter)
Angstrom - A unit of measurement for the wavelength of light. (1A= O.1nm)
Bandpass - A filter’s bandpass tells how wide a region of the light spectrum is transmitted around the primary wavelength.
The narrower the bandpass, the more surface detail becomes visible on the Sun. You can further narrow the bandpass of
your primary single stack filter by adding an additional filter of the same size to the objective. The term “double stacking” is
used to describe this process.
E.R.F. - Energy Rejection Filter. Prevents UV and IR light from entering the telescope.
Etalon - The heart of a Coronado filter. Composed of optics with tolerances 4 times tighter than those used in the Hubble
telescope.
Granulation - Small scale convective cell structures visible in white light (“rice grains”), best seen in apertures over three
inches, and in green light. Each cell consists of a brighter polygonal area of hot rising gas typically about 1100 km across,
and a cooler edge or “channel” of descending gas about 230 km wide.

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Example of some common H-a Solar Features. The
solar features visible to you will change daily.

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Solar Facts
The Sun is on average 93 million miles (150 million km) away from Earth and 900,000 miles (1.4 million km) across.
The Earth is about 8,000 miles (13,000 km) across.
Think of the Sun as a basketball and Earth as pin head and you have the proper proportions.
It takes a little over 8 minutes for light from the Sun to reach Earth.
Approximately 1 million Earths would fit inside the Sun.
Solar radius =695,990 km =432,470 mi =109 Earth radii
Solar mass =1.989 1030 kg =4.376 1030 lb =333,000 Earth masses
Solar luminosity (energy output of the Sun) = 3.846 1033 erg/s
Surface temperature =5770 K =10,400 °F
Surface density =2.07 10-7 g/cm³ =1.6 10-4 Air density
Surface composition =70% H, 28% He, 2% (C, N, 0, ...) by mass
Central temperature =15,600,000 K =28,000,000 °F
Central density = 150 g/cm³ =8x Gold density
Central composition =35% H, 63% He, 2% (C, N, 0, ...) by mass
Troubleshoong
Solar observing is a unique aspect of the telescope hobby and there are a few things to keep in mind and tricks that may
assist in the early outings, even for those who may have owned one or more traditional night time telescopes:
Locating the Sun: Sometimes the single hardest thing for new owners to master is the simple act of locating the brightest

18
object in the sky. One pro tip is to simply look at and minimize the shadow of the telescope on the ground. Flat level ground
like a sidewalk will make this easier.
Be sure to use the lowest power/widest field eyepiece available also just to make finding the Sun easier- you can then
switch to higher magnification. The Meade PST has a built in Sun finder while Coronado III models come with the Sol
Ranger™ finder, also available separately for those purchasing a Coronado filter set only.
GOTO and Tracking: Meade AutoStar or AudioStar equipped mounts and telescopes can be “mock aligned” in the
daytime by simply doing a standard Meade one star alignment. Although the stars themselves will obviously not visible in
broad daylight, this pseudo-alignment will allow motorized tracking of the Sun, while selecting Mercury from the database
after the mock alignment should take the scope to the near vicinity of the Sun itself. You can then center the Sun using the
keypad arrow keys.
The image isn’t focused: The first thing to look for is a sharp disk which is easiest to determine by examining the edges of
the Sun. Step Two is to use the T-Max™ tuner to minimize or remove any ghost image. Step Three is to use the H-αtuning
on the scope to enhance the visible detail on the disk, prominences, and any specific features of interest. If, however, the
disk is very sharp but without any discernable detail whatsoever it is possible that the image in the eyepiece is actually a
ghost image of the Sun and the Sun itself is in fact completely outside the field of view of the eyepiece. Double check to be
sure the Sun is actually in the very center of the Sun finder and if needed move the telescope slightly in a search pattern
to find the actual Sun. The dierence between a ghost and the actual Sun will be immediately obvious once seen the first
time.
Detail: Many observers report that with time and experience their own perception of detail becomes more acute. H-αlight
is very far into the red end of the spectrum and our eyes are not, initially, very sensitive to this. The more you view the more
you may find you perceive additional detail more easily. Blocking stray light with a hat or even complete head covering
(observing cloth) blocking all ambient light can actually make a great dierence and we definitely recommend giving it a
try. As with any telescope observing conditions will vary greatly from day to day, changing the level of detail you can see.
Additionally of course the Sun itself is an ever changing object unlike the vast majority of celestial targets with changes in
the surface features and prominences taking place over the course of mere hours or even minutes. Be sure to observe often
and we hope you greatly enjoy the experience of taking in the wonder of the unique and highly dynamic center of our Solar
System.

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Meade Instruments Warranty for Coronado® Products
The Meade Instruments Statement of Limited Warranty is published at:
www.meade.com/supports/warranty/
A printed copy of the Meade Statement of Limited Warranty will be made available by Meade upon wrien
request.
See below for Meade contact informaon.
Warranty Claim
Meade Instruments
89 Hangar Way
Watsonville, CA 95076
[phone]
customer[email protected]
SUBJECT: Warranty Claim

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Register Your Coronado® Product
Register your Coronado® solar telescope with Meade Instruments to receive updates and other important
informaon related to your product.
Visit the URL below to register your product: www.meade.com/product-registraon
Or scan the QR code to access the product registraon page: