Multiuse Helical Focuser F4 for QHY5II ZWO SG4 CCD Astronomical Telescope 60mm

Description

Multiuse Helical Focuser F4 for QHY5II ZWO SG4 CCD Astronomical Telescope 60mm
Versatile 60mm aperture Guide Scope with a built-in helical focuser for precise focusing of potential guide stars; will help guide you to capturing higher quality astrophotos;an ideal addition to any astrophotographers collection of gear
The helical focuser simply moves the attached device inwards or outwards while maintaining its orientation;this convenient feature means your field of potential guide stars will not rotate as focus is adjusted, further increasing ease of use
For those nights when you don't plan to capture astrophotos exposures, this versatile Guide Scope can double as a straight-through finder scope with an optional 1.25" eyepiece installed;For example, inserting a 25 mm eyepiece creates a 9.6x60 finder scope, or you can insert one Illuminated Centering Eyepieces for use as a finder with illuminated crosshairs for easy aiming
The focuser boasts 8 mm of precise helical focus travel;plus telescoping drawtube housing provides up to 35mm of additional back-travel if needed for your particular autoguider device;No extension tubes necessary; a compression ring fitting keeps any inserted autoguider cameras or eyepieces free of pesky scratches
The Multi-Use Guide Scope with Helical Focuser also features male T-threads on the focuser collar for secure threaded attachment of guide cameras equipped with female T-threads
You can use this handy scope as a deluxe, straight-through 60mm finder by inserting an optional 1.25" eyepiece (sold separately). A practical benefit of this is that prior to guiding,
you can insert an eyepiece into the guide scope and easily align the guide scope with your main imaging telescope. Then remove the eyepiece and attach your autoguider camera
This complete guide scope comes with two heavy-duty guide scope rings and a 3.5" long, 1.18"wide dovetail mounting bar, which is compatible with dovetail finder scope bases for easy attachment.
The dovetail bar features five threaded through-sockets for versatile attachment options. The included guide scope rings feature six metal thumbscrews for precise aiming
Specification:
Type of Telescope: Achromatic Refractor
Lens: Cemented
Tube material: Aluminum Alloy
Aperture: 60mm / 2.36in
Focal Length: 240mm /9.45in
Focal Ratio: F4
Coating: Fully multi-coated
Best for imaging: Deep sky
User level: Intermediate
Rough Focusing Range: 35mm
Focuser: Helical Focuser with 8 mm Travel
Connection to eyepiece: 1.25inch
Tube diameter: 66mm
Dewcap diameter: 69mm
Total Length: 270mm
Included accessories: Tube Rings and Dovetail Rail
Package Includes:
60mm Primary Mirror
Guiding Bracket w/ 89mm Dovetail Plate
1.25inch Helical Focuser
6PCS Metal Thumbscrews
Notice: when you attach guide scope and metal and metal collide the focus barrel may be make a sound. But the sound is very small.
If the set screw is tight, there is no flop.
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