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Coronado CEMAX 18mm Eyepiece (1.25") — for use with Coronado H-alpha Solar Telescopes and filters. 1.25" Barrel Size. Specifically designed for use at H-alpha (or Ha) wavelengths, this specialty eyepiece uses optimized coatings to enhance contrast, minimize glare and also affords excellent contrast for planetary viewing as well. Comes with caps.
Please note that this eyepiece is NOT a filter and for Solar observing must be used in conjunction with a Coronado Ha Solar Telescope or telescope with a Coronado filter set appropriately and safely mounted.
Features 20mm eye relief, 52° field of view, and rubber eye guard.
CAUTION: Never look at the Sun, either directly or through a telescope, without a professionally made protective solar filter installed that completely covers the front of the instrument, or permanent eye damage could result.
| User level |
| Intermediate |
| Design |
| Proprietary |
| Eyepiece focal length |
| 18.0mm |
| Barrel size |
| 1.25" |
| Apparent field of view |
| 52.0° |
| Eye relief |
| 20.0mm |
| Coatings |
| Fully multi-coated |
| Filter threads |
| Yes |
| Parfocal |
| No |
| Barrel security recess |
| Yes |
| Blackened lens edges |
| Yes |
| Rubber eyeguards |
| Yes |
| Body material |
| Aluminum |
| Case |
| No |
| Warranty |
| Two year |
