Description
Yes. One owner reports excellent results with the AT102ED. At 714mm focal length, the 4mm gives you 179x well within the scope’s capabilities and a very effective planetary magnification for a 4-inch ED doublet.
Final Thoughts
The 4mm UWA is the extreme-magnification specialist of the Astro-Tech 82 line the eyepiece you buy knowing you won’t use it every night, but knowing that when you do, nothing else in the case will show you what this one shows you. Alan Dyer’s review for Cloudy Nights puts it plainly: it performs superbly. At 4mm, 82 field, 12mm eye relief, and 164 grams, it’s an invitation to push your telescope to its limits on the nights that deserve it.
Tech Details:
| Focal Length | 4mm |
| Apparent Field of View | 82 |
| Optical Elements | 7 elements, fully multi-coated |
| Eye Relief | 12mm |
| Barrel Size | 1.25″ |
| Waterproof | Yes O-ring sealed |
| Warranty | 1 year |
Reviews
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