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Hi,
These will be the Orion Expanse series with the SO label. In an F6 scope they are pretty average IMO. FWIW the 20mm is the worst of the lot, but none are great.
The Orion Stratus/Baader Hyperion are clearly the best option for you if you are budget constrained, need long eye relief and a 1/2 decent FOV. Nothing cheaper is even worth considering in an F6 scope, if you expect anything like reasonable performance.
CS-John B
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