ESSLNB 883945 700X60mm Astronomical Telescope Instruction Manual

ESSLNB 883945 700X60mm Astronomical Telescope Instruction Manual

Introduction

ESSLNB new astronomy telescope can let you enjoy and explore both terrestrial and celestial objects in our nature as well as a lot of fun. Our manufacturer promises that it is a kind of high-end product with non-polluting and non- toxicity substances, each of whose materials have passed the professional certification to be harmless to the human body. Please read this instruction manual carefully and completely. There is much important information you need to know to give the best effect from your telescope.

If you need help in assembling or operating your telescope, you may contact us by mail at any time.

Let’s go on a wonderful journey to operate our telescope. Wish you will love it.

WARNING
TO AVOID ANY EYE INJURY NEVER LOOK DIRECTLY INTO ANOTHER OPTICAL INSTRUMENT THROUGH THE TELESCOPE AND NEVER OBSERVE THE SUN WITH UNPROTECTED EYES!

Telescope Parts

A. Micro adjustable altitude control
B. Focusing wheel
C. Focusing tube
D. Diagonal lens
E. Eyepiece
F. Finder scope bracket
G. Finder scope
H. Main telescope body
I. Sunshade
J. Objective lens
K. Yoke locking screw
L. Adjustment lockingnut
M. Yoke bracket
N. Azimuth lock
O. Tripod head
P. Accessory tray
Q. Tripod leg
R. Rubber tipped feet

Instruction For Assembly

1. Extend the tripod legs to desired length by opening the wing nut

2. Gently pull the tripod apart and close the wing nut

3. Attach the accessory tray (P) to the flanges of the tripod legs by rotating it until fix in the groove according hole shape

4. Mount the main body in the yoke (M)and adjust it using the large locking screw (K), then fix it by tightening down both sides of yoke screws

5. Attach Micro adjustable altitude control (A) to main body. Rotate a screw into the hole tightly with triangle screwdriver

6. Attach Micro adjustable Altitude control to the yoke(M). Insert other end into the hole tightly by adjustment locking nut(L)

7. Loosen the thumbscrews and then insert finder scope into the bracket. Objective lens should be directed towards the front

8. Remove two thumbscrews from main body. Locate the bracket on it. Drilled screws into holes line up with main body. Tighten two thumbscrews

9. Loosen the thumbscrew and remove the cap

10. Insert the diagonal lens (D) into the focusing tube(C). Hold it in place by tightening down the mounting bolts

11. Loosen the thumbscrew. Insert the eyepiece into the diagonal lens. Then tighten it

12. If there is a below Len, insert it between eyepiece(diagonal lens)and the focusing tube. Maybe it’s better effect between eyepiece and focusing tube without diagonal lens. Depending on your need.

Telescope Use

1. Look into the eyepiece, lessen and rotate the knob screw as shown, you can adjust the angle of observation you need for finding the target

2. Loosen screw, look into the eyepiece and turn the telescope to your target by Adjustment Locking Nut (L), then tighten

3. Loosen screw as shown, turn the telescope to your target by Adjustment Azimuth Lock(N), rotating Yoke Bracket (M) until you find the target, then tighten

4. Roll focusing knob to make target clear

5. Look into the eyepiece of finder scope, roll the eyepiece of finder scope until target get clear

6. For calibration, move the finder scope until the target is the same as in the telescope

7. After calibration of finder scope, look into eyepiece of it, turn the direction of telescope to your target, then tighten screw

8. Look into the eyepiece of telescope, roll the focusing knob to make the target clear

9. Replace to high power eyepiece to magnify your target

10. If there is a below Len, insert it as shown in the instruction of assembly

FINDERSCOPE ADJUSTMENT

As the telescope only offers a limited field of view, it may be fairly hard to locate a star or planet for observation. This is why the telescope is fitting with a finder scope for orientation purposes. We recommend performing the following adjustments IN daylight.

1. Insert the eyepiece with the lowest magnification factor into the angle prism connector. Observe an easily recognizable fixed object that is no more than 300 meters away. Swivel the telescope through its horizontal axis and adjust it along the vertical axis until the object is located right in the center of your field of view, then immobilize the telescope by tightening it down securely.
2. Now look through the finderscope. If the object seen through the telescope can’t be seen, slacken the adjusting nut and move the finderscope until you can see the object. Then tighten down the adjusting nut making sure that the object remains visible in the center of the finderscope. To simplify this procedure, use the adjusting nut to position the object in the center. The finderscope will move in the direction in which the nut is turned. As soon as the eyepiece adjustment coincides with that of the finderscope, all of the nuts can be finally tightened down.

AITITUDE-AZIMUTH MOUNT

The telescope is fitted with an Altitude-Azimuth mount. “Altitude” refers to the telescope’s up and down or vertical movement, while “Azimuth” refers to its sideways or horizontal movement. The Altitude Azimuth mount used in conjunction with the micro adjustable Altitude control and Azimuth Lock(N) lets you see the entire night sky or any celestial body without having to move the tripod.

MAGNIFICATION–SELECTING A SUITABLE EYEPIECE

The magnification defines the telescope’s ability to enlarge an image or to bring it closer in order to see it better.

To this end, we recommend confirming to the following general guideline: ideal viewing conditions are obtained when the magnification factor corresponds to monored than 15 to 20 times the lens diameter ,i.e. the optimal magnificationof100Xto 125X obtained with a 60mm diameter lens makes it possible too bservemostcelestial bodies. We recommend using a lower magnification factor for observing the stars as the field of view will be wider so that the object being observed willbe easier to locate. The highest magnification factor should only be used for especially finely detailed observations of the moon. This is because the moon is relatively close and exceptionally bright, so that good detail  resolution is obtained deven with a high magnification ratio.

BARLOW LENS

The Barlow lens increases the magnification factor provided by the telescope. A 3X Barlow lens will therefore triple the telescope’s magnification power. Consequently it is possible to triple a 56X magnification factor to increase it to 168X using a 3X factor Barlow lens. The highest magnification factor Barlow lens should only be used for very bright, large objects such as the moon and the brightest planets or during nighttime observations when conditions are optimal. Do not use the Barlow lens and the eyepiece extension in conjunction with the angle prism for this combination leads to especially low resolution and results in the inability to properly focusing viewing. If the Barlow lens to the focusing tube, then fit the required eyepiece directly onto the Barlow lens. Focusing is then performed in the usual way.

TIPS

1. Always start viewing with your 20mm eyepiece. This is your low power eyepiece and its wide viewing field will make it easier to locate objects. By the way, you will notice that stars, when seen through your telescope, still look like points of light. This is because they are so far away. Even the largest telescopes show stars only as bright points.
2. Once you have located an object and the view is clear you may wish to change to the high power eyepiece. You will notice that your object looks bigger, but not as bright as seen with the 20mm eyepiece. This is normal. If the viewing conditions are not good the high power image may not appear sharp or stable. If this happens, switch back to the 20mm eyepiece and try the high power eyepiece another night. You can also achieve higher power by inserting the 3X Barlow lens between the telescope and either eyepiece. This triples the available power.

Cleaning & Maintenance of Optics

Optical components of a telescope will over time get dirty. The amount of dirt and dust collected onto a lens or mirror should only be removed with the utmost care and this is at times best left to people with experience in this procedure. A considerable amount of dirt or dust must be present on the optical surface before one will notice the effect visually.

1. Keeping the dust caps on during storage of the telescope will reduce the amount of dust collect.
2. After using the telescope there might be dew condensation, on the optical surfaces. When the telescope is brought inside remove the dust caps and allow the moisture to evaporate naturally Point the telescope downwards so as to minimize the collection of airborne dust.
3. Once the moisture is gone then replace the dust caps.
4. If you wish to remove dust from the lenses or mirrors you first should try using a can of filtered compressed air. Remove the dust cap and the dew shield in the case of the refractor style of telescope, or take the mirror cell out of the reflecting type. Once you are able to freely blow across the surface of the optics then begin by first pointing the can away from the piece and gently expel some air. This will remove any condensate in the air can lines and clear off dust that may have accumulated on the discharge tube. Next using short quick bursts of air carefully remove the dust particles. DO NOT HOLD THE TRIGGER OF THE COMPRESSED AIR FOR TOO LONG AS CONDENSATE MIGHT BE BLOWN OUT ACROSS THE OPTICAL SURFACE. If particles still remain after several attempts at removal than the telescope should probably be taken back to the dealer for cleaning.

The optics of your telescope should last a long time before they generally require a major cleaning. Avoid sudden temperature fluctuations likely to cause any dampness in the air to condense on the telescope’s lens. By keeping the dust caps on and avoiding the temptation to handle the lenses or mirrors you will find that very little is needed in the way of optical maintenance.

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