How to Focus the Sky-Watcher SK909AZ3 Refractor Telescope

A telescope must be focused accurately to view an object properly. An out-of-focus telescope will show blurs or nothing at all. The first time you use a new telescope, it will most likely be out of focus. Get proper focus and begin enjoying the new vistas that your telescope provides. Focusing a Sky-Watcher SK909AZ3 Refractor Telescope can be done in a few steps.

Difficulty: Easy

Instructions

1. Locate the focus knobs present on your telescope assembly.

2. Turn the knobs gently while looking at the object simultaneously.

3. Get the sharpest possible image by turning the knobs. Your focusing will be appropriate when you reach a point where the sharpness of the image decreases on turning the knob either in the clockwise or counter-clockwise direction.

4. Make sure that you do the focusing again after changing your eyepiece or while adding or removing a Barlow lens. In such a situation, you are likely to get a blurred image after a change of eyepiece, which can be taken care of by proper refocusing.

5. Note that any change in stability of the telescope or tripod movement will require you to refocus.

Tips & Warnings

• Minute changes in the temperature and flexures can change the focus of your telescope. This is true especially in cases of short focal ratio telescopes.
• Be careful when moving a telescope. It is very fragile equipment.