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Cheap widefield eyepieces are poor performers in fast scopes such as the GSO dob. I strongly recommend forgetting all thoughts of panoptic or nagler performance at a budget price. It just doesnt happen. What you usually get is a smallish usuable field no bigger than that of the plossl, surrounded by seaguls.
If you want to do things on a budget I would recommend the following.
Orion shorty plus
12.5mm plossl
15mm plossl
20mm plossl
and either a 30-32mm plossl or a 30mm GSO superview.
The 12.5 and 15mm plossls are good for general dso work and give you two very useful magnifications when barlowed for planetary viewing.
Plossls much shorter than the 12.5 become uncomfortable to view through due to short eye relief.
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