FR-4: 1¼” stop ring for sliding onto 1¼” eyepiece barrels.
Adjusting ring or lock ring for 1.25″ receptacles (1901531 #30)
The adjusting ring is attached via the 1.25″ barrel of an eyepiece or
adapter and clamped with the two knurled screws. In order to
ensures that the same focus position is always reached
will.
CHF 29.90
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