Download PDF by Michael P. Borgia (auth.): Human Vision and the Night Sky: Hot to Improve Your

Download PDF by Michael P. Borgia (auth.): Human Vision and the Night Sky: Hot to Improve Your

By Michael P. Borgia (auth.)

This booklet isn't really for beginners.

Nor is it for specialists – in its place it addresses the desires of sensible beginner astronomers who have the desire to make the bounce to the recent demanding situations of significant visible gazing.

Second Steps in Observational Astronomy starts off by means of educating you, as an novice astronomer, to take advantage of crucial software you have got: your eyes. visible watching is particularly certainly a ability that may be realized. in fact it is very important have your different optical gear – telescope and add-ons – manage and working as completely as attainable. This ebook describes how.

After those important preliminaries, next chapters comprise a sequence of looking at demanding situations that might entertain you and push your staring at talents to repeatedly larger degrees of excellence for years to come.

Take a travel of the solar-system as you by no means considered it prior to, then past into the area of deep area – utilizing simply your personal eyes to bare extra aspect than you ever concept possible.

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Additional info for Human Vision and the Night Sky: Hot to Improve Your Observing Skills

Sample text

Electric cameras operate much more smoothly and precisely. The quality of the lens of your camera is important since you will not always use it to image through your telescope. You may wish to mount the camera on top of the telescope “piggyback” style. This allows a clock-driven telescope to serve as mount for beautiful wide-field panoramic shots. Also consider a camera that offers an array of telephoto lenses. This allows modest magnifications to be used while retaining a wide field view. The only other type of accessory that is an absolute must is a cable release for the shutter.

If you get good at it though, the results are well worth it. Long-exposure astrophotography requires that the telescope be carefully guided throughout all the time the shutter is opened. If the target is allowed to drift, the result will be a badly streaked image. Modern clock drives are very good at tracking objects, but no motor drive is perfect so you will always need to correct in right ascension. With an extremely accurate polar alignment and a perfectly level telescope, you can eliminate the need to correct in declination.

The Barlow lens does exactly the opposite. It will double or even triple the magnification provided by a typical eyepiece. The Barlow lens utilizes a single element concave lens that has the effect of doubling the magnification of the eyepiece–telescope combination. Adding one Barlow effectively doubles the number of eyepieces at your disposal. Barlows are usually inexpensive to add to a telescope collection making it a great addition for any scope. They are however a bit on the long side and that means there will be a dramatic change in focus from where the focuser of the telescope was originally set.

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