DIY astronomical telescope objective glass lens Blue film
Lens Size:
| Diameter(mm) | Focal Length(mm) | Coating |
| 22 | 81.7 | Blue Film |
| 28 | 100 | Blue Film |
| 30 | 130 | Blue Film |
| 72 | 280 | Blue Film |
| 72 | 400 | Blue Film |
| 82 | 330 | Blue Film |
| Coating | Multilayer Film |
| Combined image quality | 1/4-1/8 |
| Diameter tolerance | +0/-0.12 mm |
| Center thickness tolerance | ±0.2mm |
| Focal length tolerance | ±0.1% |
| Finish | 60/40 |
| Eccentricity | 1' |
Return or Exchange
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- If you are not satisfied when you receive your item, please return it within 14 days for a replacement or money back.
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- If item is defective in 3 months, We will send you a replacement without extra charger, or offer refund after we receive the defective item.
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