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AstroZap Focusing Cap for ETX 105 - AZ-404


AstroZap Focusing Cap for ETX 105

This focus cap does two jobs for your telescope. When you want to focus the image during astrophotography sessions, just turn the center knob to "Open" to reveal a trio of off-axis masks that will get the job done. This position allows the focusing cap to operate the same as a simple Bahtinov mask. However, the Astrozap Focus Cap doesn't stop working there. Rotate the wheel again to place the cap in the "Closed" position and either take dark frames or use it as you would any dust cap.

Made from lightweight aluminum and powder-coated black, this Astrozap Focusing Cap is strong and aesthetically pleasing. As for installation, three thumbscrews hold the Focusing Cap firmly in place.

The AstroZap Focusing Cap for ETX 105 will fit 110mm-120mm optical tubes.