| Brand and Model: | Explore Scientific 9mm 120° |
| Price ($USD): | 995 |
| Type: | Hyperwide Angle |
| Focal Length: | 9 mm |
| Barrel Size: | 2 |
| Apparent FOV: | 99.9 degrees |
| Field Stop Dia.: | 22.3 mm |
| Eye Relief: | 6 mm |
| Elements: | 12 |
| Weight (lbs): | 2.8 |
| Description: | This an amazing eyepiece, advertised as having an apparent field of 120°. The actual apparent field is about 140°. There is NO COMA in my 22" f/4, stars are as sharp at the edge as at the center. Excellent light throughput, excellent ocntrast. There is lateral color in the outer 10° of the field for bright objects (Jupiter turns white, but shape is normal and bands still clearly visible).Comparison to 8mm Delos - stars slightly sharper in the Delos. |
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