Earth and Sky Adventure Shop Ltd.: Abe Slomovitz (Eyepiece Selection and Care), has been an avid observer for over 20 years, and has worked in the industry as sales representative and telescope repair technician for over 5 years. He recently opened a full service telescope retail store in Ajax.

Today's amateurs are faced with a bewildering array of eyepieces to choose from. Which eyepiece is best depends not only on the type of telescope you own, but also on what you are observing and the characteristics of your eyes. In this workshop, Abe will describe the various types of eyepieces available today, their characteristics, and how to determine which types are best for you. In addition Abe will demonstrate proper eyepiece cleaning techniques.

Eyepiece Evaluation Software: To help you evaluate your eyepiece collection, a special EXCEL workbook has been prepared and will be available on a computer during the workshop. This will create a customized table for you, showing the magnification, true field, and exit pupil of the eyepieces for your telescope. You will need to know the focal length and diameter of your telescope's objective (in mm), your eyepiece types and their focal lengths (eg., 20 mm Kellner), and if applicable, your Barlow magnification (eg., 2x) and your focal reducer magnification (eg., 0.63x).