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The GSO SV 30mm is a 2inch eyepiece, and is a good starters widefield eyepiece.
It's not sharp to the edge in an f/5 scope like mine or yours, but it's good for about 70% to the edge. For the price (under $75 I think), they're good value for money for a beginner.
They work well as a "finder", for scanning through the milky way looking for something fuzzy. They also work well for large open clusters.
If you want a widefield eyepiece that gives stars that are sharp all the way to the edge of the FOV, in an f/5 scope, you will need to spend considerably more - like above AU$300, most likely more.
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