AmScope TLS-70700 Manual de instruções - Página 10

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12. TIP'S

Picking a place to observe

Where you place your telescope when observing is dependent upon your

unique situation, but if you have a choice, follow these suggestions:

•

Find a level or near level spot.

•

Choose grass or dirt whenever possible.

•

Stay away from decks or other elevated surfaces. They vibrate when

you walk on them and will shake your telescope and therefore, the

image.

•

Never look across or over objects that are producing heatwaves. This

includes asphalt parking lots on hot summer days or building rooftops.

It will take a while before the surface stops radiating heat, which

distorts the air and therefore, the image.

•

Try to stay away from sources of light. Turn off your porch lights, and

if you are friendly with your neighbors, ask them to turn theirs off as

well.

•

Pick a location with the widest view of the sky you can find. In wooded

areas and those with lots of tall buildings, this can be a challenge.

General Observing

When working with a telescope, there are a few things to remember to ensure

you get the best possible image.

•

Never look through window glass. Glass found in household windows

is optically imperfect, and as a result, may vary in thickness from one

part of a window to the next. This inconsistency can and will affect

the ability to focus your telescope. In most cases, you will not be able

to achieve a truly sharp image, while in some cases you may see a

double image. An open window can be even worse, because warmer

indoor air will escape out the window, causing turbulence which also

affects images. Astronomy is an outdoor activity.

•

If you wear corrective lenses (specifically glasses), you may want to

remove them when observing with an eyepiece attached to the

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telescope. When using a camera, however, you should always wear

corrective lenses to ensure the sharpest possible focus. If you have

astigmatism, corrective lenses must be worn at all times.

Weather conditions

You will be amazed at how quickly seeing conditions change, and what

effect they have on observations! The sky may be clear, but seeing can be

so bad that Jupiter or Saturn might look like they are underwater, and even

low magnification views are not in focus. The next night (or the next hour!)

those same planets will look perfectly focused in your highest magnification

eyepiece and all because the seeing conditions improved.

Before you set up your telescope for a night of observing, get in the habit of

taking a few moments to look up and check the conditions:

•

Are the skies clear or are there passing clouds? Knowing there are

clouds in the area helps you understand why an object you are gazing

at suddenly disappears.

•

Hazy skies, fog, and mist can also make it difficult to focus when

viewing terrestrially. The amount of detail seen under these conditions

is greatly reduced. Also, when photographing under these conditions,

the processed film may come out a little grainier than normal with

lower contrast and underexposed.

•

Are the stars twinkling? If so, are they steady overhead, or do they

twinkle from horizon to horizon? Most of the time, stars overhead are

steady, and the twinkling increases as you move towards the horizon

due to the increased atmosphere. If stars are twinkling overhead, you

have "poor seeing", but if they are steady almost to the horizon, then

grab your scope and get set up, because the seeing is especially

good, and who knows how long it will last!

•

Is it windy? A slight breeze can help keep dew at bay, but too much

wind can degrade seeing conditions and make observing

uncomfortable.

•

Is it especially humid out? Is dew already forming on surfaces? Dew

is not a deal-breaker unless it gets so heavy that all of your optics are

affected.

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