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Starlight Instruments 3.0" to 2.0" Reducer Adapter
The Starlight Instruments Reducer Adapter allows you to use standard 2.0" eyepieces, diagonals, and imaging accessories with a focuser that has a 3.0" opening. This component is machined to the same high tolerances as the focusers themselves, ensuring a secure grip while maintaining precise optical alignment for both visual observation and astrophotography.
Securely Adapt Your 3.0" Focuser for 2.0" Accessories
When you invest in a large-format focuser, you need an adapter that preserves its mechanical precision. This reducer is engineered to provide a solid, concentric connection, eliminating the tilt and slop common with generic adapters that can degrade image sharpness.
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Precision Fit: Machined to slide perfectly into a 3.0" compression ring opening, this adapter provides a zero-flex interface between your focuser and your 2.0" accessory train.
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Maintains Optical Alignment: The tight tolerances ensure that your eyepieces, camera nosepieces, and other accessories are held perfectly on the optical axis, which is critical for achieving sharp, focused stars across the field.
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How does the Starlight Instruments 3.0" to 2.0" Reducer Adapter install?
Installation is straightforward. You simply slide the Starlight Instruments Reducer Adapter into the 3.0" opening of your focuser's drawtube and secure it using the focuser's existing thumbscrews. You can then insert your 2.0" accessory into the adapter and lock it in place.
Why use this Starlight Instruments adapter instead of a generic 3.0" to 2.0" reducer?
A high-end focuser's purpose is to eliminate mechanical flex and tilt. A generic adapter can reintroduce these problems. The Starlight Instruments Reducer Adapter is machined to the same high tolerances as their focusers, ensuring a perfectly concentric, rigid connection that maintains the integrity of your optical train.
Can I use the Starlight Instruments Reducer Adapter for astrophotography with my CPC 1100?
Yes, absolutely. This adapter is designed to be rigid enough to support the weight of a typical imaging camera with a 2.0" nosepiece. Its precision fit prevents tilt, which is essential for maintaining a flat field and round stars during long exposures with instruments like a Celestron CPC 1100 equipped with a 3.0" focuser.
Does this adapter add optical elements to the light path?
No, this is a purely mechanical adapter. It contains no lenses or glass. Its sole function is to reduce the mechanical opening of the focuser from 3.0" to 2.0" without altering the optical properties of your telescope.
What kind of 2.0" accessories can I use with this Starlight Instruments adapter?
You can use any standard 2.0" accessory, including:
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| Kind |
reducer ring |
| Telescope-side connection |
thread: 3in barrel; gender: barrel |
| Camera-side connection |
thread: 2in barrel; gender: clamp |
| Material |
aluminum |
| Warranty |
2 years |
| Fits |
3.0" Compression Ring Opening to Accept 2.0" Accessories |
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Starlight Instruments Reducer Adapter for 3.0" Compression Ring Opening to Accept 2.0" Accessories
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- Starlight Instruments 2-Year Warranty
