Sample Chapter

Chapter 2 - Practical Focusing

You may have heard that focusing is difficult, or time consuming, or just plain annoying. It doesn’t have to be. You do need to be extremely careful when focusing to get the best possible results. Accurate focusing is one of the most important ingredients in a good CCD image -- and it's totally under the control of the operator.

The key to good focusing is knowing what to look for. The difference between almost focused and critically focused is a very, very small movement of the focuser. In this chapter, you will learn everything you need to know to focus effectively. You'll learn:

• Why focusing is so critically important

• How to achieve best focus every time

• Tips for visually adjusting focus

• Software aids for achieving best focus

• Hardware aids for achieving best focus

• Alternative focusing mechanisms

Note: Acrobat version 5 is required to view the sample chapter.

The following sections of chapter 2 are available in Acrobat 5 format:

• Focusing Fundamentals
• Focusing Visually
• Software-Assisted Focusing
• Aids to Focusing

Don't have Adobe Acrobat 5? Download Acrobat here.

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