Hi Castor.
I have a 9.5mm ED-2 that I like a lot. As Mike stated it is correct the longer FL EDs suffer from blackouts/kidney beaning. 9.5 mm and under are great budget planetary eyepieces.
Also I have the vixen 5mm LV that I just love to use on planets. Both have built in barlows, but only the LV can you take off as a unit to turn it into a 10mm.
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