QSI 520c Betriebsanweisung PDF herunterladen (Seite 46)

QSI 500 SERIES USER GUIDE

Note: Please refer to the Cooling the Camera discussion in Section 2 Camera

Features and Controls for in-depth information on cooling your 500 Series

camera and the available cooling options.

Focusing with MaxIm LE

Achieving precise focus is critical for producing high quality astronomical photos. This

seemingly simple task is surprisingly difficult when using the long focal lengths typical of

astronomical telescopes. Fast telescopes with small focal ratios are great for

astrophotography, but they make focusing even more of a challenge. The smaller the focal

ratio, the shorter the critical focus zone. With some optical systems, the size of the critical

focus zone can be less than 100 microns (0.1 millimeters), or roughly 0.003 inches.

MaxIm LE includes a Focus tab to assist with achieving critical focus. In the Camera

Control Window, click the Focus Tab.

The Focus tab allows you to take a continuous series of short exposures while adjusting the

focus of your telescope or other lens. As stars come into focus they produce a smaller disk

of light with more of the total light from the star being focused into a smaller area. The

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QSI 520c Betriebsanweisung Seite 46