Levenhuk Skyline 130х900 EQ - Инструкция по эксплуатации - Страница 14

This new “azimuth” motion is called Right Ascension (R.A.). In addition, the mount swivels North (+) and 

South (-) from the Celestial Equator towards the celestial poles. This plus or minus “altitude” from the 

celestial equator is called Declination (Dec.).

Now, consider pointing the telescope to the western or eastern horizon. If the counterweight is pointing 

North, the telescope can be swiveled from one horizon to the other around the Dec. axis in an arc that pass-

es through the NCP (any Dec. arc will pass through the NCP if the mount is polar-aligned). It can be seen 

then that if the optical tube needs to be pointed at an object north or south of this arc, it has to be also 

rotated around the R.A. axis.

Pointing in any direction other than due North requires a combination of R.A. and Dec. positions.

Telescopes with long focal lengths often have a “blind spot” when pointing near the zenith, because the 

eyepiece-end of the optical tube bumps into the mount’s legs. To avoid this, the tube can be very carefully 

slipped up inside the ring clamps. This can be done safely because the tube is pointing almost vertically, and 

therefore moving it does not cause a Dec. balance problem. It is very important to move the tube back to 

the Dec. balanced position before observing other sky areas.

Something which can also be a problem is that the optical tube often rotates so that the eyepiece, finder-

scope and the focusing knobs are in less convenient positions. The diagonal mirror can be rotated to adjust 

the eyepiece. However, to adjust the positions of the finderscope and focusing knobs, loosen the tube rings 

holding the telescope tube and gently rotate it. Do this when you are going to observe an area for while, as 

it is inconvenient to repeat every time you briefly go to a new area.

Finally, there are a few things to consider to ensure that you are comfortable during the viewing session. 

First is setting the height of the mount above the ground by adjusting the tripod legs. You must consider the 

height that you want your eyepiece to be, and if possible plan on sitting on a comfortable chair or stool. 

Very long optical tubes need to be mounted higher or you will end up crouching or lying on the ground when 

looking at objects near the zenith. However, a short optical tube can be mounted lower so that there is less 

movement due to vibration sources, such as wind. This is something that should be decided before going 

through the effort of polar aligning the mount.

Camera adapter

To attach a camera to your telescope you may need an adapter to get the camera focused. Some reflectors 

require wider motion range than the one allowed by the focuser; 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.

16

Specifications

Levenhuk Skyline 

120х1000 EQ

Levenhuk Skyline 

130х900 EQ

Levenhuk Skyline 

90х900 EQ

Levenhuk Skyline 

70х900 EQ

Optical design

reflector

reflector

refractor

refractor

Aperture

120 mm

130 mm

90 mm

70 mm

Focal length

1000 mm; f/8.8

39.37”; f/8.8

900 mm; f/6.9

35.433”; f/6.9

900 mm; f/10

35.433”; f/10

900 mm; f/12.9

35.433”; f/12.9

Highest practical power

230x

260x

180x

140x

Limiting stellar magnitude

12.2

12.5

11.8

11.2

Resolution threshold

1.2 arcsec.

1.1 arcsec.

1.5 arcsec.

1.9 arcsec.

Eyepiece

1.25”; SUPER10 & 

SUPER25

1.25”; SUPER10 & 

SUPER25

1.25”; SUPER10 & 

SUPER25

1.25”; SUPER10 & 

SUPER25

Finderscope

5x24

6x24

6x30

6x24

Mount

EQ1

EQ2

EQ2

EQ1

Tripod

aluminum; 

710-1230 mm

27.953” — 48.425”

aluminum; 

700-1250 mm

27.953” — 49.213”

aluminum; 

700-1250 mm

27.953” — 49.213”

aluminum; 

650-1200 mm

25.591” — 47.244”