I have a Masuyama 10mm and its a great eyepiece in the centre. The small number of lenses translates into a bright image.
I also have had a 16mm Nagler T5 and it is a lovely eyepiece. Nice and small.
But back and forth with it and a Morpheus 17.5mm I found I preferred the Morpheus due to the better eye relief meaning a relaxed longer view. In other other ways they were almost the same.
Its not 16mm but the APM 12.5mm HiFi is better than all these.
I had a 19mm Panoptic for years and it was my go to eyepiece for a long time. I also had a pair for binos and it worked really well.
Greg.
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