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Thanks Ivan.
I had a 13mm Ethos years ago and I remember it to be wonderful eyepiece just large and heavy and very expensive.
I ended up selling to help fund some astro gear acquisition.
The APM20XWA is stunning in the AP130GT. So much so I ordered the 9mm XWA which arrived today so it will be put through its paces next clear night.
Edge performance was better in the 13mm Ethos as I recall. Edge performance on the APM cleans up with the Tak 1.6X extender.
Greg.
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