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TMB 20mm Stellar Eyepiece?

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#1 agmoonsolns

agmoonsolns

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Posted 13 February 2019 - 10:14 PM

Has anyone tried or have more information on the old TMB 20mm Stellar eyepiece and on the Stellar series of eyepieces in general? 

 

What I know: 6-element, only one run produced and some units had coatings issues (Thomas was planning on more runs after correcting this but passed away before he had a chance), 17mm eye relief, and a 61 degree FOV.

 

One of the rumors I have heard is these were variations of the Pretoria coma-correcting eyepiece design and Thomas used the Vernonscope 20mm coma-correcting Brandon and the University Optics 28mm Pretoria as the inspiration for the Stellar series.




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