Which focuser does this Starlight Instruments adapter fit?
This adapter is specifically designed to mount a 3.0-inch Starlight Instruments Feather Touch focuser to the rear cell of an Astro-Tech 130mm F6 telescope.
Will this adapter fit my Astro-Tech 130mm telescope if it's not the F6 model?
No, this adapter is machined for the specific M140x1 rear cell threads of the Astro-Tech 130mm F6 model. It is not compatible with other versions of the 130mm telescope that may use different thread sizes.
What's the main benefit of using this adapter to image a target like the Andromeda Galaxy (M31) with my Astro-Tech 130mm F6?
When imaging large targets like the Andromeda Galaxy (M31), you often use heavy cameras and filter wheels. This adapter allows you to install a 3.0" Feather Touch focuser, which can handle that weight without tilt or flexure, ensuring your stars are sharp across the entire frame for the long exposures required.
How does this M140x1 threaded adapter improve imaging with my Astro-Tech 130mm F6 and a heavy camera?
The M140x1 threaded connection creates a rigid, solid-body link between your telescope and the focuser. Unlike compression or slip-fit adapters, a threaded connection prevents any sag or tilt, which is critical for maintaining optical alignment when using a heavy imaging train with a large sensor camera, filter wheel, and off-axis guider.
Is installation of this Starlight Instruments adapter on my Astro-Tech 130mm F6 difficult?
Installation is typically straightforward. It involves carefully unthreading the stock focuser assembly from the telescope's rear cell and then threading this Starlight Instruments adapter in its place. The new 3.0" Feather Touch focuser then attaches to the adapter.
Can I use this adapter to mount a 2.0" or 2.5" Feather Touch focuser on my Astro-Tech 130mm F6?
No, this adapter is specifically designed for the Starlight Instruments 3.0-inch line of focusers. You would need a different adapter to mount a 2.0-inch or 2.5-inch model.
