Alstar 1.25" حلقات عدسة تلسكوبية Parfocal، مجموعة من ثلاثة
مميزات خاصة
- Eliminate the need to make focus adjustments when changing telescope eyepieces.
- Also useful for setting focus point of calibration eyepiece used for focusing an imaging or guide camera.
- With parfocal ring equipped telescope eyepieces you can change magnifications quickly and easily.
- "They are made of precision machined aluminium with black anodizing. "
- This set of 3 Alstar Parfocal Rings lets you make a set of non-parfocal 1.25" telescope eyepieces parfocal for more efficient observing.
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