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Howie Glatter 2.0" Parallizer Eyepiece Centering Adapter
The Howie Glatter 2.0" Parallizer Eyepiece Centering Adapter is a dedicated holder that establishes a perfectly parallel optical axis for all your 2" accessories. It is known to fit any 2" Feather Touch SCT adapter (sold separately).
The Parallizer Principle: Axial Alignment for 2" Accessories
This adapter is built on Howie Glatter's patented Parallizer principle, which prioritizes axial parallelism over simple centering. The Parallizer clamps each cylindrical surface between two parallel straight edges with an opposite clamping point, so the accessory axis stays parallel to the holder axis. Even a few arc minutes of angular misalignment can be detrimental, especially for collimation tools and camera adapters.
SCT Integration with 2" Feather Touch Adapters
The SCT Parallizer needs a 2" Feather Touch SCT adapter for your telescope, sold separately; it is known to fit any of them.
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Required Component: A 2" Feather Touch SCT adapter is mandatory for use.
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Broad Compatibility: Adapters are available for most popular SCTs, including Celestron C8, C9.25, C11, C14 (including EdgeHD models) and Meade 8", 10", and 12" models.
Parallizer vs. Standard Holders: Why Parallelism Matters in a 2" System
A standard thumbscrew or compression ring holder can push an accessory slightly off-center, but a more significant issue is the introduction of tilt. Even a few arc minutes of angular misalignment can be detrimental, especially for collimation tools and camera adapters. The Parallizer is designed to keep the axes parallel.
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What do I need to attach the Howie Glatter 2.0" SCT Parallizer to my Celestron C11?
A 2" Feather Touch SCT adapter made for the C11, sold separately. The SCT Parallizer is known to fit any 2" Feather Touch SCT adapter.
How does the Howie Glatter Parallizer principle work differently from a standard 2" adapter?
The Parallizer clamps the accessory's cylindrical barrel between two parallel straight edges with an opposite clamping point, so the accessory axis stays parallel to the holder axis instead of being tipped by a single thumbscrew.
Is the Howie Glatter 2.0" SCT Parallizer self-centering?
The design prioritizes perfect parallelism over perfect centering. While it is very precise, its primary engineering goal is to eliminate angular tilt. A very small, inconsequential centering offset is optically harmless, whereas even a tiny amount of tilt can degrade collimation and image quality.
Why is axial parallelism so important for collimation with a laser?
If your laser collimator is tilted in the focuser, the beam it projects will not represent the true optical axis. You could end up misaligning your mirrors while trying to "correct" for the tilt in the adapter. The Howie Glatter Parallizer ensures the laser is perfectly parallel to the focuser axis, providing a true reference for accurate collimation.
Does this Howie Glatter adapter thread directly onto my telescope's rear cell?
No. It fits a 2" Feather Touch SCT adapter, which attaches to the telescope. Buy the Feather Touch adapter for your telescope model separately.
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| Type |
SCT Parallizer 2" eyepiece holder |
| Accessory Side |
2" accessories |
| Telescope Side |
Any 2" Feather Touch SCT adapter (sold separately) |
| Alignment |
Patented Parallizer design |
| Camera-Side Connection |
2" barrel clamp |
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SCT Parallizer 2" holder
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Howie Glatter Warranty
