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Firstscope 70 AZ
Firstscope 80 AZ

C102 - AZ

Refracting Telescopes

INSTRUCTION MANUAL

Models #21080 and 21080-AL
Models #21075 and 21075-AL
Model #21011

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Содержание C102-AZ

Страница 1: ...Firstscope 70 AZ Firstscope 80 AZ C102 AZ Refracting Telescopes INSTRUCTION MANUAL Models 21080 and 21080 AL Models 21075 and 21075 AL Model 21011 ...

Страница 2: ...t need the boxes for everyday storage and transportation However you should save the box in case you need to ship your telescope via a common carrier To begin setting up your Firstscope AZ start with the tripod and work up from there Locate the Altazimuth mount and the tripod legs along with the tripod mounting hardware and the tripod accessory tray 1 Lie the tripod head on its side Attach the thr...

Страница 3: ...braces With the tripod set up you can adjust the height of the tripod To do this 1 Loosen the wing nuts on the lower portion of the tripod leg 2 Slide the center slat of the leg away from the tripod head until at the desired height 3 Tighten the wing nut completely to hold the leg firmly in place A wrench is provided to hold the bolt in place while you are turning the wing nut Repeat this process ...

Страница 4: ...ward a different end of the tele scope Ideally the mounting rings should be slightly farther apart than the length of the mounting platform Attaching the Telescope to the Mount You are ready to attach the slow motion control knobs 1 Retract the set screw on the metal sleeve of the slow motion control knobs until it no longer extends into the inner diameter The metal sleeve is on the opposite end o...

Страница 5: ...ile mounting the telescope tube The Altazimuth mount can be moved in two directions vertically which is called altitude and horizontally which is called azimuth Altitude For major directional changes in altitude hold the end of the telescope tube and move the telescope to the desired orientation For fine adjustments in altitude turn the slow motion control knob on the right side of the mount Turni...

Страница 6: ...ving session If how ever you want to transport your Firstscope AZ to a remote observing location you should partially disassemble your telescope for easy transportation 1 Remove the optical tube from the altazimuth mount Wrap the tube in cloth to prevent it from being scratched or dented Perform the steps for attaching the telescope in reverse order 2 Fold the tripod legs together The mount does N...

Страница 7: ... longer obstructs the inner diameter 2 Slide the chrome portion of the erect image diagonal into the accessory adapter 3 Tighten the thumbscrew on the accessory adapter to hold the diagonal in place If you wish to change the orientation to the erect image diagonal loosen the thumbscrew on the accessory adapter until the diagonal rotates freely Move the diagonal to the desired position and tighten ...

Страница 8: ...s producing heat waves This includes asphalt parking lots on hot summer days or building rooftops Hazy skies fog and mist can also make it difficult to focus when viewing terrestrially The amount of detail that can be seen under these conditions will be greatly reduced Also when photographing under these conditions the processed film may come out a little grainier than normal When using your teles...

Страница 9: ...n of 36 power Although the power is variable each instrument has a limit to the highest useful magnification The general rule is that 60 power can be used for every inch of aperture For example the Firstscope 80 AZ is 3 14 80mm in diameter Multiplying 3 14 by 60 gives a maximum useful magnification of 188 power Although this is the maximum useful magnification most observing is done in the range o...

Страница 10: ...g In addition little or no contrast can be seen at this time One of the best times to observe the Moon is during its partial phases around the time of first or third quarter Long shadows reveal a great amount of detail on the lunar surface At low power you will be able to see the entire lunar disk at one time Change to higher power magnification to focus in on a smaller area Keep in mind that the ...

Страница 11: ...e Releasing the shutter manually can cause vibration something that can produce unsharp photos A cable release will keep your hands clear of the camera and tele scope thus eliminating the possibility of introducing vibration Mechanical shutter releases can be used though air type releases are best In addition remember the focusing hints described earlier in this manual After looking at the night s...

Страница 12: ...iluted with water a couple of drops per one quart of water can be used Occasionally you may experience dew build up on the objective lens of your telescope during an observing session This may be removed with a hair dryer or by pointing the telescope at the ground Since your Celestron refractor has a built in dew cap the dewing process is slightly reduced If moisture con denses on the inside of th...

Страница 13: ...h standard eyepiece 1 0 1 4 1 4 Linear Field of View with standard eyepiece 53 73 73 F ratio f 9 8 f 11 4 f 12 9 Length 38 5 36 36 Weight Optical Tube 8 lb 5 5 lb 3 5 lb With Tripod 28 lb 18 lb 16 lb All specifications are stated for the telescope using the standard accessories These specifications are approximate and subject to change without notice Celestron offers a large assortment of accessor...

Страница 14: ...drepair Further productmalfunctionor deterioration due to normal wear is not covered by this warranty CI DISCLAIMS ANY WARRANTIES EXPRESS OR IMPLIED WHETHER OF MERCHANTABILITY OF FITNESS FOR A PARTICULAR USE EXCEPT AS EXPRESSLY SET FORTH HEREIN THE SOLE OBLIGATION OF CI UNDER THIS LIMITED WARRANTY SHALL BE TO REPAIR OR REPLACE THE COVERED PRODUCT IN ACCORDANCE WITH THE TERMS SET FORTH HEREIN CI EX...

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