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Interesting you should bring this up.
I was out a couple of nights ago, on the front porch here in suburban Sydney, and was comparing my Nagler 13T6 (82 AFOV) to my old Unitron 12.5 Ortho (45 AFOV). In the marginal conditions, I could just see the fifth star in the trapezium in the ortho, but not at all in the Nagler.
Cheers,
Jason.
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