background image

Cautions

Do not point the telescope at the sun.  Looking 
at the Sun with this telescope can cause eye 
damage and blindness

.

Do not touch or attempt to clean the optics 
(corrector plate and eyepiece).

  Some dust or 

dirt will not affect the view.  The optics can be 
damaged by improper cleaning.  Return the 
telescope to the library for cleaning.

The Telescope

The tabletop telescope will provide stunning 
views of the Moon, planets, and the brighter star 
clusters and nebulae.  The telescope will produce 

right side up terrestrial images,  however they will
be mirror images, as will the celestial images.

Telescope parts (see 

illustrations 1 & 2)

Zoom eyepiece:

  Focal length is adjustable from 

from 21 mm (60X) to 7 mm (180X).  The 
eyepiece has a rubber eye cup than can be folded 
down for eyeglass wearers.

Optical tube:

  Contains the primary optical 

components: A corrector plate, a thick meniscus 
lens that corrects the light entering the telescope 
for the spherical mirrors.  90 mm primary mirror 
at the bottom of the tube, and a secondary mirror 
which is an aluminized spot on the back of the 

 - 2 -

Illustration 1: Telescope Parts - side view

Содержание StarMax 90

Страница 1: ...Library Edition TableTop Telescope Instruction Manual Orion StarMax 90 TableTop Maksutov Cassigrain Telescope Based on the Orion TableTop Telescopes Instruction Manual Donated by and...

Страница 2: ...d nebulae The telescope will produce right side up terrestrial images however they will be mirror images as will the celestial images Telescope parts see illustrations 1 2 Zoom eyepiece Focal length i...

Страница 3: ...on the object you re aiming at The use of the finder is discussed in the Getting Started section Telescope securing knob This allows the telescope to be positioned fore and aft in the mount for balan...

Страница 4: ...and re tighten the Telescope securing knob Getting Started It s best to get a feel for the basic functions of the TableTop telescope during the day before observing astronomical objects at night This...

Страница 5: ...ny position in the night sky from horizon to horizon Altitude Tension Adjustment When aiming the telescope in altitude you may find that the optical tube is either too hard to move or does not stay in...

Страница 6: ...t s red dot should also appear in or near the field of view of the telescope s eyepiece at lowest power Alignment of the sight is easiest during daylight before observing at night 1 Without moving the...

Страница 7: ...double images into your view If at all possible escape the light polluted city sky and head for darker country skies You will be amazed at how many more objects are visible in a dark sky Seeing and T...

Страница 8: ...ters on the Moon the waxing and waning of Venus and many bright binary stars Deep sky objects are generally too faint at the magnifications employed by this Maksutov Cassigrain telescope but a few are...

Страница 9: ...many years sometimes they are seen edge on next time 2025 while at other times they are broadside and look like giant ears on each side of Saturn s disk A steady atmosphere good seeing is necessary fo...

Страница 10: ...light pollution Even bright nebulas like the Orion and Lagoon Nebulas lose much of their delicate detail The Moon and planets are not affected they require steady air more than dark skies so they rema...

Страница 11: ...llations star charts or star atlases may be consulted or borrowed from the library With these you can learn the constellations and find your way around the sky A monthly star chart for the Grand Trave...

Страница 12: ...Visible in the evening from late spring to late autumn Antares Scorpii is the bright red giant star in Scorpius It shows a yellow orange in telescopes However because it appears close to the horizon a...

Страница 13: ...r eyepiece setting The Beehive is an open or galactic star cluster that are generally found in the band of the Milky Way unless they are close to us or very old For 2015 the planet Jupiter will be bet...

Страница 14: ...ern side of the Keystone pattern of stars about one third the distance from the north star on that side to the south side It takes a much larger telescope to see individual stars The star cluster will...

Страница 15: ...The first chart is one of the constellation of Orion The second image is the southern part of Orion showing the nebula better Orion is a winter constellation 15...

Страница 16: ......

Отзывы: