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the glasses getting in the way. Get rid of them: always take off your glasses for telescopic

observation, and use the telescope’s focuser to correct your vision!

The eyepiece of a telescope is adjustable. Each person needs a different adjustment. No

one will be able to do this “focusing” for you, because we all have different eyes.

So, what are the three things you do, before anything else, before you really look? Take

off your glasses; put your eyes right on the eyepiece; and grab the focuser wheel.

You cannot focus the telescope on a deep-sky object. The only way to do it right is to

pick a star in the field. Watch it, and make it as tiny a blob as you can by adjusting the

focuser wheel. Only after proper focusing are you ready to really start looking.

3. Visual effort

Probably the most important element of astronomical observation is how carefully and

with how much effort the observer wants to see small and faint details. There is no

replacement for the will to see and for the time spent staring at your object. For the cursory

observer, even after proper focusing, Jupiter looks nothing but a patch of orange glow in a

telescope. Only after a minute or so of staring will you start discerning the actual shape of

the planet; it will take more time to start noticing the surface details. It may take a few

minutes of actual staring at the planet, repeated several times, until further detail finally

stops gradually emerging. Take your time! You will need such patience even more for faint

deep-sky objects, which you may not even notice at first sight. It is rewarding though, after

training your eyes and repeatedly trying to come up with more and more detail, to compare

what you end up seeing to what you saw for the first glance!

There is a partial shortcut that makes it easier to perceive the details. Ask an

experienced observer, what there is to see on your object. Many times, when you know

what to look for, you will find it easier to actually notice the elusive details.

--- --- --- ---

Students will do an introductory laboratory called the “Tour of the Sky”, in which they

will become familiar with some of the constellations, and experience how the various types

of deep sky objects look in a small telescope. This lab can be done only in perfect weather

conditions; even then campus lights severely limit visibility. You will need to use your

imagination as well as all visual effort to make out these deep sky objects; and only a few

will be any sort of impressive. However, your experience will serve as a baseline to

appreciate your own achievements in CCD imaging.

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Meade Image Processing Manuale Utente Pagina 6