LEVENHUK BLITZ 76 BASE (01) PDF Document

The focal length of the LEVENHUK BLITZ 76 BASE is 700 mm.

The aperture for the LEVENHUK BLITZ 76 BASE is 76 mm.

The f-number for the LEVENHUK BLITZ 76 BASE is f/9.

The optical design construction for the LEVENHUK BLITZ 76 BASE is a reflecting telescope (teleskop zwierciadlany).

The material of the optical system for the LEVENHUK BLITZ 76 BASE is optical glass with anti-reflection coating (szkło optyczne z powłoką przeciwodblaskową).

The tube material for the LEVENHUK BLITZ 76 BASE is metal.

The mount type for the LEVENHUK BLITZ 76 BASE is azimuth (AZ).

The focuser barrel diameter for the LEVENHUK BLITZ 76 BASE is 0.965".

The tripod material for the LEVENHUK BLITZ 76 BASE is aluminum, with a height adjustment range of 600-1000 mm.

Yes, the LEVENHUK BLITZ 76 BASE includes an accessory tray.

The finderscope specifications for the LEVENHUK BLITZ 76 BASE are 6×30 optical.

The included eyepieces for the LEVENHUK BLITZ 76 BASE are 4 mm, 12.5 mm, and 20 mm.

The diagonal mirror angle for the LEVENHUK BLITZ 76 BASE is 90°.

The Barlow lens magnification for the LEVENHUK BLITZ 76 BASE is 2x.

No, the LEVENHUK BLITZ 76 BASE does not include an erecting eyepiece.

The parts labeled in diagram 1d for the LEVENHUK BLITZ 76 BASE, LEVENHUK BLITZ 114 BASE are:

1. Telescope tube
2. Dew cap
3. Objective lens
4. Primary mirror
5. Focuser
6. Focusing knob
7. Diagonal mirror
8. Diagonal mirror thumbscrew
9. Eyepiece
10. Finderscope
11. Finderscope bracket
12. Finderscope adjustment screws
13. Fork mount
14. Altitude slow-motion control
15. Altitude lock knob
16. Azimuth lock knob
17. Tripod leg
18. Tripod lock knob
19. Accessory tray

To align the finderscope:

Step 1. Unscrew the two screws located at the rear of the telescope tube.

Step 2. Place the finderscope base over the holes on the tube and secure the finderscope in the proper position by tightening the screws (refer to diagram 4).

Step 3. Finderscopes are extremely useful accessories. Proper alignment of the finderscope with the telescope allows for quick object location and centering in the field of view. Alignment is best done outdoors during the daytime when locating objects is easier.

Step 4. If necessary, refocus the image in the finderscope first.

Step 5. To align the finderscope, select an object at least 450 m away and point the telescope at it.

Step 6. Adjust the telescope so that the object is in the center of the eyepiece field of view.

Step 7. Look through the finderscope and check that the object is also centered in its crosshairs.

Step 8. Use the three adjustment screws (refer to diagram 7) to align the finderscope crosshairs with the object.

The telescope can be equipped with additional accessories such as eyepieces, diagonal mirrors, or Barlow lenses. Accessories must be mounted in the specified order.

For reflecting telescopes (refer to diagram 1d):

Step 1. Loosen the thumbscrew of the focuser and remove the plastic cover from the focuser tube.

Step 2. Insert the desired eyepiece into the diagonal mirror and secure it by tightening the thumbscrew (refer to diagram 5b).

Step 3. If a Barlow lens is needed, mount it between the diagonal mirror and the eyepiece.

A Barlow lens increases the magnification of an eyepiece while simultaneously reducing the field of view. It expands the cone of focused light before it reaches the focal point, causing the telescope’s focal length to be extended relative to the eyepiece. In addition to increasing magnification, a Barlow lens helps increase the exit pupil distance and reduce the spherical aberration of the eyepiece. For this reason, using a Barlow lens with a second lens often yields better results than using a single lens of the same magnification. The main advantage of a Barlow lens is the ability to double the number of eyepieces you own.

Slowly turn the adjustment knobs until the image in the eyepiece is focused. Due to slight variations in temperature, bending, etc., slight refocusing is usually necessary. Changing the focus is almost always necessary when changing eyepieces or adding or changing the Barlow lens.

The AZ mount is an altitude-azimuth mount that allows rotating the telescope in the horizontal and vertical planes and changing its altitude and azimuth.

To adjust the horizontal position, loosen the large lock knob located under the mount base and rotate the tube relative to the left or right axis, then tighten the knob again.

To adjust the vertical position, loosen the vertical adjustment knob and rotate the tube. Rotate the slow-motion control knob on the altitude slow-motion rod for more precise vertical adjustment.

For more precise adjustment, use the vertical slow-motion knob. Due to the Earth’s movement, objects will constantly shift and disappear from the field of view, so adjusting the telescope’s vertical and horizontal position will be necessary to continue observations.

Reference materials usually provide information on declination coordinates given in degrees, minutes, and seconds above or below the horizon line. Azimuth coordinates may be given according to compass directions (N, SW, ENE, etc.), but more often they are given on a 360-degree scale, where north is 0°, east is 90°, etc. (refer to diagram 8).

The technical specifications for the LEVENHUK BLITZ 76 BASE are as follows:

Tripod Assembly:

Step 1. Slowly loosen the tripod lock knobs and gently extend the lower sections of the tripod legs. Tighten the screws to set the desired height of the legs (except for Blitz 70s BASE) (refer to diagram 2).

Step 2. Spread the tripod legs so that it stands upright.

Step 3. Adjust the height of each leg until the tripod head is properly leveled. Remember that after leveling the mount, the height of the tripod legs may be different (except for Blitz 70s BASE).

Step 4. Install the accessory tray on the bracket and secure it with the thumbscrews from underneath or fasten the accessory tray with one screw in its central part (except for Blitz 50 BASE, Blitz 70s BASE).

Mounting without the fork (refer to diagram 3a):

Step 1. Unscrew the altitude lock knob from the mount head.

Step 2. Place the telescope optical tube onto the azimuth mount, aligning the holes in both elements.

Step 3. Insert the altitude lock knob through the holes in the mount head and the optical tube (check that the holes are not blocked before tightening the knob). Attach the tube by screwing in the altitude lock knob.

Mounting without the fork (refer to diagram 3b):

Step 1. The telescope tube is equipped with a mounting plate on the bottom. Place the plate into the recess on the upper part of the tripod.

Step 2. Tighten the knurled knob on the mount head to secure the tube to the mount.

Step 3. Insert the arm into the threaded hole in the rear part of the mounting bracket.

Models with a fork mount (refer to diagram 3c):

Step 1. Unscrew the lock screw from the altitude adjustment rod.

Step 2. Insert the rod into the hole on the side of the fork mount.

Step 3. Place the telescope tube between the arms of the fork mount so that the holes on the tube align with the holes on the arms. Secure the telescope tube to the mount by tightening the thumbscrews.

Step 4. Secure the other end of the rod to the telescope tube by inserting the screw through the shaft and holes and tightening it.