Why should I upgrade to a Starlight Instruments 6-32 Thumb Screw?
It provides a much larger, easier-to-grip head than the standard set screws. This allows you to rotate your focuser or SIPS unit for framing without needing tools, which is especially useful in the dark or when wearing gloves.
Which length of the Starlight Instruments 6-32 Thumb Screw should I choose: 1.25", 2.0", or 2.5"?
The choice depends on your setup. The longer 2.0" and 2.5" screws offer the most leverage and are easiest to grab, but you must ensure they won't interfere with your mount, camera, or other accessories. The 1.25" screw is a good all-around option that maintains a lower profile.
I'm using a Starlight Instruments SIPS on my Newtonian. Will these thumb screws make it easier to frame galaxies like the Whirlpool Galaxy (M51)?
Yes, absolutely. When framing objects like M51, you often need to rotate the camera to get the perfect composition. These thumb screws allow you to loosen the SIPS unit, rotate your camera to frame the galaxy and its companion, and re-tighten it by hand in seconds.
Are these Starlight Instruments thumb screws compatible with all Feather Touch focusers?
These are 6-32 thread thumb screws, designed specifically for the rotation lock on Starlight Instruments focusers and SIPS units. Always confirm the thread size of the screw you are replacing on your specific model before ordering.
If I'm imaging with a large camera on my SCT with a Feather Touch focuser, will the 2.5" thumb screw provide a secure enough lock?
Yes. The screw's function is to lock the rotation of the focuser body, not to support the weight of the camera. Once tightened by hand, it provides ample friction to hold the orientation of your focuser and heavy imaging train securely in place while you capture data on your target.
How many Starlight Instruments 6-32 Thumb Screws do I need for my focuser?
Most Starlight Instruments focusers and SIPS units use two or three set screws to lock the rotation. Check your specific focuser model to determine the number of screws you will need to replace. These are sold individually.
