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Lew Zealand
scholastic sledgehammer
Reged: 06/28/04
Posts: 768
Loc: Pasadena, CA
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Re: Best Eyepieces For $100 or Less
08/08/08 01:21 AM
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My list of good EPs for $120 (that extra $20 really is necessary) or less which I own and use:
8-24mm Baader Hyperions (24mm is the runt but still decent in f/6 and above). I have no reason to believe that the 3.5 and 5mm are any different.
2.5, 3.2, 6, 9mm BO/TMB planetaries. Again, I have no reason to believe that the others in the series are any different.
40mm WO SWAN (best above f/6). Based on reviews here at CN, the 33mm is as good, some others in the series are not as good.
30mm 1rpd and it's many clones (best above f/6). No others in this series.
9 and 6mm Expanse and it's many clones. The 15 and 20mm of the series are not as well-corrected. The 9mm is very much like the BO/TMB 9mm but with 10° wider FOV and no convenient twist-up eyeguard. 6mm reported by some not to be quite as sharp as the 9mm (though I don't see the difference) but still very good.
Hon. mention: 20mm GSO Superview (best above f/6)
Commonalities between these EPs:
All have excellent eye relief and I can use all with my glasses on
All have at least 60° FOV:
BO/TMBs - 60°
GSO SV - 65°
Expanse - 66° (really ~70° for the 9mm)
Hyperions - 68°
SWANs - 70-72°
1rpd - 80°
other <$120 EPs I don't own but which I know are good to keep an eye out for:
used 10mm or lower Speers-WALERs. I have the 1st gen. 5-8mm Zoom and other reports for these shorter FL Speers confirm their *excellent* edge correction, especially for an 80° EP in fast scopes. IMO, these are the best "inexpensive" EPs I never tried out.
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8" LX90, StarBlast 6", 100mm f/6 achro, 60mm f/5.8 achro, 60mm f/11.7 achro, 10x50s, 15x70s
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