Manual Bresser 90-70000 National Geographic (page 13 of 48) (English, German, Dutch, French, Italian, Polish, Spanish)

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IMPORTANT

Only secure screws finger tight.

Do not overtighten screws.

2. Tripod

The tripod legs are preinstalled and connected to the tripod head

(No. 5, X) and tripod spider (No. 1, 16).

Remove the tripod from its packaging and place it upright, with the

feet at the base. Take two of the legs and carefully pull them apart

until they are in the fully open position. The entire weight of the

tripod rests on one leg during this procedure. Then set the tripod

upright again.

Now extend each individual tripod leg to the desired length (No. 4),

and then tighten the clamping screw on each leg (No. 4, 11), until

they are all hand tight. Do not overtighten the screws. The clamping

screws serve to set the

tripod leg interior segments to the desired height.

NOTE

The right ascension axis (green line, No. 16)

is also called the axis of sidereal time on the

meridian. The declination axis (blue line, No. 16)

is also called the elevation axis.

3. Mounting

Fasten the mount (No. 1, 9) to the tripod head (No. 5, X) by inserting

the mount into the tripod head from above and hand tightening the

knurled screw from below.

Prepare the mount (No. 1, 9) by putting the weight on the weight

shaft pole (No. 7, X) and securely screwing it into the mount from

below.

Then, place the tube ring (No. 1 and 3, 8) on the mount and affix it

with the screw (No. 8, X).

4. Accessories tray:

Insert the accessories tray (No. 1, 3 and 10) flat side down onto the

center of the tripod spider (No. 1, 16) and mount in place by turning

it clockwise 60° (No. 6). Align the three fittings of the accessories

tray with the tripod spider retaining fittings to fix the tray in place.

5. Tube:

To mount the telescope tube (No. 1, 1) onto the tripod, undo the

screw on the tube ring (No. 9, X) and open up the ring.

Then place the tube in the centre of the ring and close the ring up.

Finally, secure the mounting by tightening the screw.

Note: The main tube clamp may have two screws depending

on model (No. 9b). If so, the main tube mounting process

remains the same as described above.

6. Inserting the eyepiece

6.1. On refracting telescopes

The eyepieces allow you to decide which magnification you want

your telescope to have.

Before you insert the eyepiece and the star diagonal prism, you must

remove the dust-protection cap from the eyepiece connection tube

(No. 1, 6).

Loosen the screw (No. 12, X) on the eyepiece connection tube and

insert the star diagonal prism. Retighten the screw (No. 12, X) on the

eyepiece connection tube.

Loosen the clamping screw (No. 13a, X) to fasten the 20 mm eye-

piece into the zenith mirror in the same way, and then retighten the

clamping screw to secure the eyepiece in place.

Make sure that the eyepiece is pointing vertically upward.

If it is not, loosen the screw (No. 12, X) on the eyepiece connection

tube and rotate the star diagonal prism into the vertical position.

6.2. On reflecting telescopes

Loosen the clamping screws on the eyepiece supports (No. 1, 6).

Insert the 20 mm eyepiece (No. 2, 18) directly into the eyepiece

supports. Hand tighten the clamping screws (No. 3b, X).

Remove the dust cap from the main tube end.

RISK OF BLINDNESS

Never use this device to look directly at the sun

or in the direct proximity of the sun. Doing so may

result in a risk of blindness.

7. Assembling the finder scope/LED finder scope

Note: The LED finder scope's battery is safeguarded against

discharge with plastic foil when shipped. The foil must be

removed before first use (No. 1d).

7.1. Finder scope installation (type I)

Finder scope with threaded mounting

The finder scope and finder scope mount (No. 1a, 2) are included in

the packaging.

Remove the finder scope mount fastening screws on the main tube

(No. 1a, X), and set the mount onto the projecting screws on the tel-

escope's main tube. Carefully reinsert and tighten the screws previ-

ously removed to securely fasten the finder scope mount in place.

Now, undo the finder scope adjusting screws (No. 1a, 3) — three or

six depending on finder scope model — until the finder scope can

easily be slid into its mounting.

Important: Make sure the finder scope lens points toward the main

tube end (No. 1, 4).

Retighten the screws equally to securely fasten the finder scope in

place.

7.2. Finder scope assembly (type II)

LED finder scope with screw threading

To assemble the LED finder scope (No. 1b, 2), remove the LED

finder scope on the telescope's main tube (No. 1c, X). Set the LED

finder scope onto the projecting screws fastening screws on the

telescope's main tube. Then carefully reinsert and tighten the screws

previously removed to securely fasten the LED finder scope in place.

Important: Make sure the LED finder scope lens points towards the

main tube end (No. 1, 4).

7.3. Finder scope assembly (type III)

LED finder scope with Quick Insert

The LED finder scope (No. 1b, 2) and mount constitute a single unit.

Slide the foot of the LED finder scope completely into the appropri-

ate base on the telescope's main tube (No. 10, X). The finder scope

mount will snap in place.

Important: Make sure the LED finder scope lens points towards the

main tube end (No. 1, 4).

7.4. Finder scope assembly (type IV)

Finder scope with Quick Insert

The finder scope and its mount are preassembled and included in

the packaging.

Slide the finder scope mount foot entirely into the appropriate base

on the telescope's main tube (No. 10, X). The finder scope mount will

snap in place.

Important: Make sure the LED finder scope lens points towards the

main tube end (No. 1, 4).

There are two clamping screws (No. 1c, 3) and a spring-loaded

counter screw on the finder scope mount. Evenly tighten the clamp-

ing screws until resistance is felt to securely fasten the finder scope

in place.

8. Aligning the finder scope

8.1 Aligning types I and IV (finder scopes)

The finder scope must be adjusted before use; the finder scope and

the telescope's main tube must be aligned parallel to one another.

Insert the eyepiece with the greatest focal length into the zenith mir-

ror ( No. 13a, refracting telescopes only) or directly into the eyepiece

supports (No. 13b, reflecting telescopes only). Point the telescope

at a significant object approximately 300 metres away (e.g. a house

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Bresser 90-70000 National Geographic Manual

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