Alstar 2" Parfocal Telescope Eyepiece Rings, Set of Two
Special Features
- With parfocal ring equipped telescope eyepieces you can change magnifications quickly and easily.
- Eliminate the need to make focus adjustments when changing telescope eyepieces.
- This set of 2 Alstar Parfocal Rings lets you make a set of non-parfocal 2" telescope eyepieces parfocal for more efficient observing.
- They are made of precision machined aluminium with black anodizing.
- Also useful for setting focus point of calibration eyepiece used for focusing an imaging or guide camera.
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