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Eyepiece holders

Eyepiece holders connect accessories with 31.8mm or 50.8mm barrel diameter to focusers, rotators, and other optical devices. In most traditional holders, the inserted accessories are fixed with one or more set screws and, under load, this can cause micro-flexures and tilt the sensor relative to the optical axis. Our OnAxisLock2 is the new generation locking system that, compared to the classic set-screw system, offers the following advantages:

- more clamping force, avoiding any flexure (making it perfect for astrophotography)
- it does not damage the connected accessory
- it perfectly centers the optical axis of the telescope

All this thanks to a new compression ring design: just rotate the outer ring (designed for an easy grip, even with gloves) to obtain a perfect lock!

OnAxisLock2 31,8mm eyepiece holder
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Eyepiece holders

OnAxisLock2 31,8mm eyepiece holder

PL8410100
$78.00
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OnAxisLock2 31.8mm eyepiece holder fits into any standard 50.8mm connection and converts it to accept 31.8mm accessories, locking them with a simple manual rotation of the outer ring. Unlike traditional set-screw systems, OnAxisLock2 uses a double compression ring that distributes pressure evenly around the full barrel circumference: no scratches, no...
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OnAxisLock2 50,8mm visual back for ESATTO 2" or ARCO 2"
  • New
  • Not available
Eyepiece holders

OnAxisLock2 50,8mm visual back for ESATTO 2" or ARCO 2"

PL8410015
$75.00
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OnAxisLock2 50.8mm visual back screws directly onto the M56 thread of ESATTO 2" focuser or ARCO 2" rotator and lets you connect any 50.8mm accessory with a simple manual rotation of the outer ring. Unlike traditional set-screw locking systems, OnAxisLock2 uses a double compression ring that distributes pressure evenly around the full barrel circumference:...
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You can order from your preferred dealer.

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