Ultra Deep M51
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Post-processed on 24" iMac using PixInsight, eXcalibrator, Aladin Sky Atlas and Adobe Photoshop CS4
Source FITS files contain data from the following telescopes:
| Author | Telescope | D, mm | F Ratio | Camera | Pixel Size, micron | Exposure, min |
| Andrey Kuznetsov | Astrosib RC-360 | 360 | 8.00 | FLI PL-09000 | 12.00 | 390 |
| Boris Satovskyy | Astrosib RC-360 | 360 | 8.00 | SBIG STL-11000M | 9.00 | 460 |
| Dmitry Ivanov | Newtonian, 230/1105 + Paracorr | 230 | 5.53 | QHY-9 | 5.40 | 390 |
| Harry Page | Newtonian, 14" f/5 | 352 | 5.00 | SXVF H16 | 7.40 | 425 |
| Igor Chekalin | TAL-250K + Focal Reducer | 250 | 6.00 | Canon 350Da | 6.40 | 630 |
| Ivan Ionov | Newtonian, 250/1250 | 250 | 5.00 | QHY2Pro | 6.45 | 116 |
| Nikita Shamorgin | Astrosib RC-508 | 508 | 8.00 | Canon 5D Mk.II | 6.40 | 690 |
| Oleg Milantiev | Newtonian 250/1250 + Paracorr | 250 | 5.75 | Canon 450Da | 5.31 | 1230 |
| Pedro Re | TMB 152mm APO | 152 | 8.00 | SBIG ST-10XE | 6.80 | 300 |
| Russel Croman | RCOS 20" f/8 Ritchey-Cretien + FC | 502 | 8.00 | SBIG STL-11000M | 9.00 | 945 |
| Steve Mazlin | RCOS 16" f/8.7 Ritchey-Cretien | 402 | 8.70 | SBIG STL-11000M | 9.00 | 1740 |
| Vlad Onoprienko | Santel 9" Maksutov-Cassegrain | 228 | 7.63 | SBIG ST-2000XM | 7.40 | 435 |
| Yuriy Toropin | TEC 140ED APO | 140 | 7.00 | QSI-583wg | 5.40 | 495 |
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