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Hyperion 2" Finetuning Stop Ring (with
internal brass compression ring) is an additional accessory for the Baader Hyperion eyepieces. It is to be used when
observing with a 2” mirror or
prism star diagonal and
prevents the 1¼” eyepiece
barrel from hitting and damaging
the mirror star diagonal or prism, whenever
additional Finetuning Rings are lengthening the
original eyepiece body.
The second photo above demonstrates the
combination of a Hyperion eyepiece, a 14mm finetuning ring, a 2” stop ring and a 2" diagonal mirror.
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