levenhuk 72847 Skyline BASE Telescopes User Manual

: June 5, 2024
: levenhuk

Table of Contents

levenhuk 72847 Skyline BASE Telescopes
Levenhuk Skyline BASE Telescopes
Specifications
Care and maintenance
References
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Download This Manual (PDF format)

levenhuk 72847 Skyline BASE Telescopes

levenhuk-72847-skyline-base-telescope-PRODUCT-IMAGE

1a
Levenhuk Skyline BASE 50T, Levenhuk Skyline BASE 60T, Levenhuk Skyline BASE 70T, Levenhuk Skyline BASE 80T

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1b
Levenhuk Skyline BASE 80S, Levenhuk Skyline BASE 100S, Levenhuk Skyline BASE 120S

1c
Levenhuk Skyline BASE 110S

Dust cap
Dew cap.
Objective lens
Telescope tube
Finder scope
Finder scope bracket;
Eyepiece
Diagonal mirror
Eyepiece holder
Azimuth lock knob
Fork mount
Altitude slow-motion control
Altitude lock knob
Tripod leg
Accessory tray
Tripod lock knob
Azimuth slow-motion control
Ring clamps

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Diagonal mirror
Barlow lens
Eyepiece

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Zenith
Nadir
N E S W
Meridian line
Rotation around the azimuth axis
Latitude

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Focuser
Eyepiece holder
Extender
T-adapter
Camera

Levenhuk Skyline BASE Telescopes

CAUTION! Never look directly at the Sun — even for an instant — through your telescope or finder scope without a professionally made solar filter that completely covers the front of the instrument, or permanent eye damage may result. To avoid damage to the internal parts of your telescope, make sure the front end of the finder scope is covered with aluminum foil or another non- transparent material. Children should use the telescope under adult supervision only.

All parts of the telescope will arrive in one box. Be careful when unpacking it. We recommend keeping the original shipping containers. In the event that the telescope needs to be shipped to another location, having the proper shipping containers will help ensure that your telescope survives the journey intact. Make sure all the parts are present in the packaging. Be sure to check the box carefully, as some parts are small. No tools are needed other than those provided. All screws should be tightened securely to eliminate flexing and wobbling, but be careful not to overtighten them, as that may strip the threads.
During assembly (and anytime, for that matter), do not touch the surfaces of the optical elements with your fingers. The optical surfaces have delicate coatings on them that can easily be damaged if touched. Never remove lenses or mirrors from their housing, or the product warranty will be null and void.

Telescope optical system and construction
Levenhuk Skyline BASE is a series of easy to use entry-level telescopes. These telescopes are perfect for kids and beginners in astronomy. Reflectors are good for studying solar system and bright deep-sky objects, while refractors are suitable for planetary observations as well as for studying terrestrial objects.
This user manual is applicable to several refractor (fig. 1a) and reflector telescopes (fig. 1b, 1c) on
alt-azimuth mounts. Read the user manual carefully to find the information about the assembling and adjustment of your telescope model, and carefully follow the instructions.

Tripod assembly:

Slowly loosen the tripod locking knobs and gently pull out the lower section of each tripod leg. Tighten the screws to hold the legs in place.
Spread the tripod legs apart to stand the tripod upright.
Adjust the height of each tripod leg until the tripod head is properly leveled. Note that the tripod legs may not be the same length when the mount is leveled.
Place the accessory tray on top of the bracket, and secure it with thumbscrews from underneath(fig. 2a) or secure the accessory tray with one screw in the middle of the tray (fig. 2b).

Mount assembly
Fork mount (fig. 3a):

Remove the locking screw from the slow-motion control rod.
Insert the rod into the hole on the side of the fork mount.
Place the telescope tube between fork arms so that holes on the tube match the arm holes. Fasten the telescope tube to the mount with thumbscrews.
Fasten the other end of the rod to the telescope tube by inserting the screw through shaft and tube holes and tightening it.

Mount without a fork (fig. 3b):

Remove the altitude lock knob from the mount head.
Place the telescope optical tube on the altazimuth mount so that the hole in the optical tube lines up with the hole in the mount head.
Insert the altitude lock knob through the mount head and optical tube. Make sure the hole is clear all the way through before tightening the knob. Secure the altitude lock knob.

Ring clamps mount (fig. 3c):

Remove the ring clamps from the telescope by releasing their thumbscrews and opening their hinges.
Using the bolts provided, fasten the ring clamps to the mount with a wrench.
Place the telescope tube between the rings and balance it.
Close the hinges around the telescope and retighten the thumbscrews. Do not overtighten.

Optical accessories assembly
Your telescope can be equipped with additional accessories, such as eyepieces, diagonal mirror or prism, or a Barlow lens. The accessories should be installed in well-defined ordering.
Refractors (fig. 4a): Loosen the focuser thumbscrew. Insert the diagonal mirror into the focuser tube and retighten the thumbscrew to hold the diagonal mirror in place. Then, insert the desired eyepiece into the diagonal mirror and secure it by retightening the thumbscrew. If a Barlow lens is needed, install it between the diagonal mirror and the eyepiece.
Reflectors (fig. 4b): Loosen the focuser thumbscrew and take off the plastic cap from the focuser tube. Insert the selected eyepiece and secure it by retightening the thumbscrew. If a Barlow lens is needed, install it between the focuser and the eyepiece.

Optical finder scope assembly and alignment
Unthread two screws in the back of the telescope tube. Place the finder scope base above the holes on the tube. Lock the finder scope base into position by tightening the screws (refractor 5a, reflector 5b).
Optical finder scopes are very useful accessories. When they are correctly aligned with the telescope, objects can be quickly located and brought to the center of the view. Turn the scope end in and out to adjust focus (fig. 6).
To align the finder scope, choose a distant object that is at least 550 yards (500 meters) away and point the telescope at the object. Adjust the telescope so that the object is in the center of the view in your eyepiece. Check the finder scope to see if the object is also centered on the crosshairs. Use three adjustment screws to center the finder scope crosshairs on the object (fig. 7).

Operating the mount
The AZ mount is an alt-azimuth mount that allows you to rotate the telescope about the vertical and horizontal axes and change its altitude and azimuth. To adjust the azimuth, loosen the big locking knob under the mount base and rotate the tube left or right about the axis then retighten it. To adjust the altitude, loosen the altitude adjustment knob and rotate the tube. For more precise motions use the altitude slow-motion control. Due to Earth’s movement, the objects will be constantly shifting out of your view, so you will have to adjust the altitude and azimuth of your telescope to continue your observations (fig. 8).
Reference materials usually list declination coordinates in degrees, hours and minutes above or below the horizon line. Azimuth coordinates may sometimes be listed with the compass points (N, SW, ENE, etc.), but it is more commonly listed in degrees around the 360-deg plane, where north is 0°, east is 90°, etc.

Focusing
Slowly rotate the focus knobs one way or the other until the image in the eyepiece is sharp. The image usually has to be finely refocused over time due to small variations caused by temperature changes, flexures, etc. Refocusing is almost always necessary when you change an eyepiece, add or remove a Barlow lens (refractor 9a, reflector 9b).

Camera adapter
To attach a camera to your telescope you may need an adapter to get the camera focused. Some refractors are designed to be used with diagonal mirrors and thus need a longer focal length when used with camera. To achieve that, simply attach an extender to the focuser of your telescope and then attach the camera with a T-adapter to the extender (fig. 10).

Specifications

| Levenhuk Skyline BASE 50T| Levenhuk Skyline BASE 60T| Levenhuk Skyline BASE 70T| Levenhuk Skyline BASE 80S| Levenhuk Skyline BASE 80T| Levenhuk Skyline BASE 100S| Levenhuk Skyline BASE 110S| Levenhuk Skyline BASE 120S
---|---|---|---|---|---|---|---|---
Optical design| refractor| refractor| refractor| Newtonian reflector| refractor| Newtonian reflector| Newtonian reflector| Newtonian reflector
Optics material| optical glass with coating
Aperture, mm| 50| 60| 70| 76| 80| 102| 114| 114
Focal length, mm| 600| 700| 700| 700| 500| 700| 900| 500
Highest practical power, x| 100| 120| 140| 152| 160| 204| 228| 228
Mount| AZ1| AZ1| AZ2| AZ1| AZ2| AZ2| AZ3| AZ2

The manufacturer reserves the right to make changes to the product range and specifications without prior notice.

Care and maintenance

Never, under any circumstances, look directly at the Sun through this device without a special filter, or look at another bright source of light or at a laser, as it may cause PERMANENT RETINAL DAMAGE and may lead to BLINDNESS.
Take the necessary precautions when using the device with children or others who have not read or who do not fully understand these instructions.
Do not try to disassemble the device on your own for any reason. For repairs and cleaning of any kind, please contact your local specialized service center.
Stop using the device if the lens fogs up. Do not wipe the lens! Remove moisture with a hair dryer or point the telescope downward until the moisture naturally evaporates.
Protect the device from sudden impact and excessive mechanical force.
Do not touch the optical surfaces with your fingers. Clean the lens surface with compressed air or a soft lens cleaning wipe. To clean the device exterior, use only the special cleaning wipes and special tools that are recommended for cleaning the optics.
Store the device in a dry, cool place away from hazardous acids and other chemicals, away from heaters, open fire, and other sources of high temperatures.
Replace the dust cap over the front end of the telescope whenever it is not in use. Always put eyepieces in protective cases and cover them with caps. This prevents dust or dirt from settling on the mirror or lens surfaces.
Lubricate the mechanical components with metal and plastic connecting parts. Components to be lubricated:
- Optical tube;
- Fine mechanics (focuser rail, telescope optical tube micro focuser);
- Mounting;
- Worm-and-worm pairs, bearings, cogs, threaded mounting gears.

Use all-purpose silicon-based greases with an operating temperature range of —60 … +180°С (—76 … +356°F).

If a part of the device or battery is swallowed, seek medical attention immediately.
Children should use the device under adult supervision only.

Levenhuk International Lifetime Warranty
All Levenhuk telescopes, microscopes, binoculars, and other optical products, except for their accessories, carry a lifetime warranty against defects in materials and workmanship. A lifetime warranty is a guarantee on the lifetime of the product on the market. All Levenhuk accessories are warranted to be free of defects in materials and workmanship for six months from the purchase date. The warranty entitles you to the free repair or replacement of the Levenhuk product in any country where a Levenhuk office is located if all the warranty conditions are met.
For further details, please visit: www.levenhuk.com/warranty
If warranty problems arise, or if you need assistance in using your product, contact the local Levenhuk branch.

Levenhuk Inc. (USA): 928 E 124th Ave. Ste D, Tampa, FL 33612,
USA, +1 813 468-3001, contact_us@levenhuk.com
Levenhuk Optics s.r.o. (Europe): V Chotejně 700/7, 102 00 Prague 102, Czech Republic, +420 737-004-919, sales-info@levenhuk.cz
Levenhuk® is registered trademark of Levenhuk, Inc.
© 2006—2022 Levenhuk, Inc. All rights reserved.
www.levenhuk.com
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