Telescopes using lenses as the primary optical element.
| Topics | |||||
|---|---|---|---|---|---|
 |      | 25 | 573 | 13 days ago | |
 |     | 7 | 663 | Jul 14, 2025 | |
 |    | 7 | 331 | Jul 1, 2025 | |
 |    | 4 | 558 | Jun 24, 2025 | |
 |    | 15 | 411 | Jun 18, 2025 | |
 |     | 16 | 456 | Jun 7, 2025 | |
| 0 | 11 | May 21, 2025 | ||
 |    | 25 | 688 | May 12, 2025 | |
 |     | 16 | 179 | May 11, 2025 | |
|  | 1 | 35 | Apr 30, 2025 | |
 |     | 7 | 553 | Apr 27, 2025 | |
|  | 10 | 433 | Apr 25, 2025 | |
 |    | 13 | 355 | Apr 25, 2025 | |
 |    | 6 | 172 | Apr 22, 2025 | |
 |     | 13 | 532 | Apr 17, 2025 | |
|    | 6 | 280 | Apr 12, 2025 | |
 |  | 10 | 332 | Apr 7, 2025 | |
 |      | 9 | 231 | Apr 3, 2025 | |
 |    | 12 | 208 | Mar 28, 2025 | |
|      | 5 | 211 | Mar 23, 2025 | |
 |   | 8 | 487 | Mar 8, 2025 | |
|  | 2 | 56 | Mar 4, 2025 | |
 |   | 17 | 421 | Mar 2, 2025 | |
 |   | 12 | 255 | Feb 23, 2025 | |
|   | 18 | 384 | Feb 23, 2025 | |
|    | 22 | 603 | Feb 22, 2025 | |
 | 1 | 94 | Feb 19, 2025 | ||
 |  | 3 | 241 | Feb 18, 2025 | |
| | 5 | 124 | Feb 10, 2025 | |
 |     | 50 | 2.1k | Jan 18, 2025 | |
|  | 48 | 943 | Jan 8, 2025 | |
 | | 2 | 142 | Jan 7, 2025 | |
 |   | 34 | 1.9k | Dec 28, 2024 | |
 |  | 7 | 240 | Dec 27, 2024 | |
 |  | 2 | 72 | Dec 22, 2024 | |
|  | 3 | 234 | Dec 21, 2024 | |
 |   | 15 | 563 | Dec 20, 2024 | |
 |   | 35 | 824 | Dec 17, 2024 | |
 |    | 35 | 1.5k | Dec 15, 2024 | |
|  | 21 | 421 | Dec 15, 2024 | |
 |   | 20 | 516 | Nov 25, 2024 | |
|    | 13 | 341 | Nov 20, 2024 | |
 |  | 2 | 495 | Nov 19, 2024 | |
 |   | 24 | 1.5k | Nov 18, 2024 | |
|    | 18 | 741 | Nov 16, 2024 | |
 |  | 2 | 108 | Nov 14, 2024 | |
 |     | 18 | 916 | Nov 7, 2024 | |
 |   | 23 | 1.1k | Nov 6, 2024 | |
 |    | 9 | 294 | Oct 31, 2024 | |
|    | 11 | 406 | Oct 30, 2024 | |