Unbranded 1.25” 17MM Kellner eyepiece - full aluminum construction
This unused eyepiece was from a factory upgraded Zhumell Z114 . It is the only Kellner eyepiece that I have encountered with a black oxide aluminum construction, in addition to the 1.25” chrome aluminum barrel. My belief is that the optics are Celestron based. I have tested this unit against comparable Plossls and KEs and it responds very well to medium/long focal lengths (corrected and uncorrected)