Description
Final Thoughts
The 18mm is the eyepiece for everyone who’s struggled to find a focal length that works comfortably while delivering genuine optical quality. If you wear glasses, it’s here. If you want a transition point between survey and detail, it’s here. If you want flat-field correction without buying a premium brand at a premium price, it’s here. The 18mm UF doesn’t try to be a specialist it tries to be genuinely useful to the widest possible range of observers and observing modes. That’s a rare accomplishment in an eyepiece.
Tech Details:
| Focal Length | 18mm |
| Apparent Field of View | 65 |
| Field Stop Diameter | 27mm |
| Optical Elements | 8 elements / 5 groups, fully multicoated |
| Eye Relief | 20mm |
| Barrel Size | 1.25″ |
| Weight | 207g (7.3 oz) |
| Eyecup | Foldable rubber |
| Under-Eyecup Threading | M430.75 |
| Design | Ultra Flat Field, optimized for fast focal ratios |
| Coating | Fully multicoated (FMC) |
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