ok i have emailed high point scientific and astronomics in the USA so check whether there is a supposed "retaining ring" glare issue. and am very tempted to bring in a 4mm if things look ok.
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Features:- Designed by Thomas Back of TMB Optics
- 60° Apparent Field of View
- 16mm Eye Relief
- Fully internally baffled
- Every Air to Glass surface has Multi Broadband coatings!
- Internal spacers have flat anodizing to reduce reflections.
- Twist-up eyecups with flexible eyecups on top.
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