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exposure. f/5 is faster than f/10. The 

faster the ratio, the faster exposure time 

is needed when a camera is hooked up 

to the telescope. Your telescope has 

slower focal ratio at f/8.5. Sometimes, 

astronomers use focal reducers to make 

slow exposure telescopes have faster focal 

ratios.
Alt-azimuth mounting simply means your 

telescope moves up and down (altitude  

or “alt”), and side to side, (azimuth or “az”). 

Other mounting configurations are available 

for other telescopes, such as equatorial 

mounting.

USE THE SPECIFICATIONS TO CALCU-

LATE THE MAGNIFICATION OF YOUR 

EYEPIECE

The power of a telescope is how much it 

magnifies objects. For a Infinity 70, the 

26mm eyepiece magnifies an object 27 

times. The 9mm eyepiece magnifies objects 

78 times.

If you obtain other eyepieces, you can calcu-

late how much magnification they have with 

your telescope. Just divide the focal length 

of the telescope by the focal length of the 

eyepiece.

Focal Length of the Telescope

÷

Focal Length of the Eyepiece

=

Magnification

Look at the specifications. For the Infinity 

70, you will see that the focal length of your 

scope is 700mm. Let’s say that you have 

obtained a 13mm eyepiece. You can tell that 

what the focal length of your eyepiece is as 

it is always printed on the side of an eye-

piece. Divide:  700 ÷ 13, which equals 54.85. 

Round this off to the nearest whole number 

12

and your new eyepiece magnifies objects 55 

times.

A great accessory for your telescope is 

a Barlow lens

  If you use a Barlow lens 

with one of your eyepieces, it doubles the 

magnification of your eyepiece.  Other types 

of Barlows can triple or further increase the 

power of an eyepiece.  To find out how much 

the magnification is when you use a Barlow, 

multiply your eyepiece’s magnification  

by two.

Eyepiece’s magnification x 2

= 

Magnification with a 2X Barlow lens

For the Infinity 70 the 26mm low-power eye-

piece magnifies an object 27 times. Multiply 

27 by 2 and you get 54 times magnification 

with a Barlow.

It’s worth repeating:  Keep in mind that a 

bright, clear, but smaller image is more 

interesting than a larger, dimmer, fuzzy one. 

Using too high a power eyepiece is one of 

the most common mistakes made by new 

astronomers. So don’t think that higher 

magnification is necessarily better—quite 

Looking at or near the 

Sun

 will cause 

irreversible

 damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.

Содержание Infinity Series

Страница 1: ...MEADE INSTRUCTION MANUAL 60mm 2 4 Alt azimuth Refracting Telescope 70mm 2 8 Alt azimuth Refracting Telescope INFINITY SERIES 60 70mm Telescopes www meade com ...

Страница 2: ...ersible damage to your eye Eye damage is often painless so there is no warning to the observer that damage has occurred until it is too late Do not point the telescope at or near the Sun Do not look through the telescope or viewfinder as it is moving Children should always have adult supervision while observing ...

Страница 3: ...0mm and its objective lens has a diam eter of 60mm The Infinity 70 optical tube has a focal length of 700mm and diameter of 70mm The lens diameter is one of the most important pieces of information about the telescope The size of the objective lens determines how much detail you will be able to see in your telescope The focal length information will help later on to calculate magnification Setting...

Страница 4: ...viewfinder power switch 11 Altitude rod lock knob 12 Accessory tray mounting bolt hole see Inset A 13 Diagonal mirror 14 Objective lens cell 15 Focuser drawtube and thumbscrews 16 Altitude rod slow motion fine adjustment control 17 Altitude rod 18 Alt azimuth mount 19 Adjustable sliding center leg extension see Inset B 20 Tripod leg lock thumbscrew see Inset B 21 Dew shield lens shade 22 Front len...

Страница 5: ...irm feel 3 Repeat with the two other leg braces ATTACH THE OPTICAL TUBE TO THE MOUNT The optical tube gathers distant light which is focused in the eyepiece 1 Remove the two lock knobs 5 from the optical tube mount 2 Slide the altitude rod 17 into the altitude lock knob hole 11 3 Place the optical tube 4 between the forks of the mount oriented as shown in Fig 3 4 Thread a lock knobs 5 through each...

Страница 6: ...a complicated way of saying that your telescope moves up and down and from side to side Other tele scopes may be mounted in different ways 1 Slightly loosen both of the star shaped altitude control knobs 5 and altitude rod lock knob 11 Loosening these knobs allow you to move the telescope up and down 2 Slightly loosen the horizontal lock knob 6 Loosening this lock allows the telescope to be moved ...

Страница 7: ...c Just relax and enjoy your scope You will begin to grow and learn more about astronomy the more you observe Browse the internet or go to the library and read some books about the stars and planets Read about astronomers of old Many of them had telescopes no bigger than the one you are using right now Galileo who is one of the first astronomers to use a telescope discovered four of the moons of Ju...

Страница 8: ...iding object The dark areas on the Moon are called maria and are composed of lava from the period when the Moon still had volcanic activity You can also see mountain ranges and fault lines on the Moon Use a neutral density filter often called a moon filter when observing the Moon Neutral density filters are available from Me ade as an optional accessory and enhance contrast to improve your observa...

Страница 9: ... interesting to observe You can see bands across the face of Jupiter The more time you spend observing these bands the more details you will be able to see One of the most fascinating sights of Jupiter are its moons The four largest moons are called the Galilean moons after the astrono mer Galileo who observed them for the first time If you ve never watched the Galilean moons in your telescope bef...

Страница 10: ...re part of our galaxy A galaxy is a large grouping of stars containing millions or even billions of stars Some galaxies form a spiral like our galaxy the Milky Way and other galaxies look more like a large football and are called elliptical galaxies There are many galaxies that are irregularly shaped and are thought to have been pulled apart because they passed too close to or even through a large...

Страница 11: ...r system on the moon or even a nebula Go your library or check out the internet for more information about astronomy Learn about the basics light years orbits star colors how stars and planets are formed red shift the big bang what are the different kinds of nebula what are comets asteroids and meteors and what is a black hole The more you learn about astronomy the more fun and the more rewarding ...

Страница 12: ...dapted before observing Use a red fil tered flashlight to protect your night vision when reading star maps or inspecting the telescope Do not use a regular flash light or turn on other lights when observing with a group of other astronomers You can make your own red filtered flashlight by taping red cellophane over a flashlight lens Viewing through windows Avoid setting up the telescope inside a r...

Страница 13: ... 2 8 Optical tube focal length 700mm Focal ratio f 10 Mounting type Alt azimuth Viewfinder Red dot What do the specifications mean Optical tube focal length is the distance light travels in the telescope before being brought to focus in you eyepiece Depending on the telescope model the focal length is either 800mm or 700mm long Look at the specifi cation table to find out your telescopes focal AST...

Страница 14: ...Let s say that you have obtained a 13mm eyepiece You can tell that what the focal length of your eyepiece is as it is always printed on the side of an eye piece Divide 700 13 which equals 54 85 Round this off to the nearest whole number 12 and your new eyepiece magnifies objects 55 times A great accessory for your telescope is a Barlow lens If you use a Barlow lens with one of your eyepieces it do...

Страница 15: ...elow the viewfinder lens clock wise If the red dot does not illuminate the battery may need replacing To replace the battery press the left side of the viewfinder housing labeled push The battery compartment will slide out on the right side of the viewfinder see Fig 6 Replace the battery with a Lithium CR2032 battery with the positive side up Then push the battery compartment back into the viewfin...

Страница 16: ...olutions Department hours are 7 00AM to 5 00PM Pacific Time Monday through Friday Write or call the Meade Consumer Solutions Department first before returning the telescope to the factory giving full particulars as to the nature of the problem as well as your name address and daytime telephone number The great majority of servicing issues can be resolved by telephone avoiding return of the telesco...

Страница 17: ... include a written statement detailing the nature of the claimed defect as well as the owner s name address and phone number This warranty is not valid in cases where the product has been abused or mishandled where unauthorized repairs have been attempted or performed or where depreciation of the product is due to normal wear and tear Meade specifically disclaims special indirect or consequential ...

Страница 18: ...DRAWING OF IMAGE photocopy this page OBSERVER OBJECT NAME DATE TIME OBSERVED CONSTELLATION EYEPIECE SIZE SEEING CONDITIONS EXCELLENT GOOD POOR NOTES OBSERVATION LOG ...

Страница 19: ......

Страница 20: ...ww w meade com Meade Instruments Corp 27 Hubble Irvine California 92618 1 800 626 3233 2014 Meade Instruments Corp All rights reserved Specifications subject to change without notice ...

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