How long to image the M56 with the Vaonis Vespera Pro 2
From a Bortle 6 suburban sky, the Vaonis Vespera Pro 2 needs about 1 h 26 min (518 subs of 10 s) for a solid image of the M56. A quick look takes 22 min; a showpiece 5 h 45 min. Under a Bortle 3 rural sky the solid figure drops to 40 min. At Bortle 6 the limit is skyglow, so a darker site or a filter helps more than longer subs. In this scope's field it fills 9% of the frame’s short side.
| Sky | Quick lookTarget obvious, still noisy | SolidClean enough to share | ShowpieceSmooth faint detail, print-worthy |
|---|---|---|---|
| Bortle 1Excellent dark site | 9 min54 subs | 36 min215 subs | 2 h 23 min857 subs |
| Bortle 2Typical dark site | 9 min56 subs | 37 min224 subs | 2 h 29 min894 subs |
| Bortle 3Rural | 10 min61 subs | 40 min242 subs | 2 h 41 min965 subs |
| Bortle 4Rural / suburban transition | 12 min71 subs | 47 min284 subs | 3 h 09 min1,136 subs |
| Bortle 5Suburban | 15 min88 subs | 59 min352 subs | 3 h 54 min1,407 subs |
| Bortle 6Bright suburban | 22 min130 subs | 1 h 26 min518 subs | 5 h 45 min2,072 subs |
| Bortle 7Suburban / urban transition | 35 min209 subs | 2 h 19 min835 subs | 9 h 17 min3,340 subs |
| Bortle 8City | 55 min332 subs | 3 h 41 min1,327 subs | 15 h5,308 subs |
| Bortle 9Inner city | 1 h 39 min595 subs | 6 h 36 min2,377 subs | 26 h9,505 subs |
Power and kit for this session
Allowing for slewing, focusing and rejected subs, that is about 1 h 52 min of run time. The Vespera Pro 2’s battery (rated about 11 h) should cover it; a power bank still keeps the phone running the app alive. (Bortle 6, solid image; we allow 30% over the integration time.)
- USB-C PD power bank 20000mAh 30WExternal bank extends the 11 h battery.
- red LED head torchRed light keeps your night vision; white light costs you twenty minutes of dark adaptation every time.
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Everything that fits the Vespera Pro 2 →
How it frames
The M56 is 8.8′ across. The Vespera Pro 2 frames 1.65° × 1.65° at 1.68″ per pixel, so it fills 9% of the frame’s short side.
Longer subs
10 s subs by default; Expert Mode manual targets allow 1 to 30 s. Alt-azimuth only; CovalENS mosaic gives 3.2° × 3.2° at 50 MP. Time for a solid image by sub length:
| Sub length | Bortle 3 | Bortle 5 | Bortle 7 |
|---|---|---|---|
| 10 s | 40 min242 subs | 59 min352 subs | 2 h 19 min835 subs |
| 20 s | 35 min104 subs | 53 min160 subs | 2 h 14 min401 subs |
| 30 s | 33 min66 subs | 51 min103 subs | 2 h 12 min264 subs |
About the M56
A small globular between Albireo and the Ring Nebula, set in a rich star field.
NGC 6779 · Globular cluster in Lyra · magnitude 8.3 · 8.8′ · best in Jun, Jul, Aug. Reachable from mid-northern latitudes (UK, northern US, central Europe) and from the south.
Globular clusters are point sources packed tight, so they come quickly: the core resolves into stars within a handful of minutes on any smart scope. More time deepens the halo and pulls in the faint outer members. Use short subs so the core does not saturate into a white blob, and no filter.
About the Vaonis Vespera Pro 2
The square-sensor 2026 Vespera with 2 µm pixels. Sharper than the Vespera 3 on small targets and correspondingly slower per pixel; the 12.5 MP square frame suits galaxies and planetaries.
10 s subs by default; Expert Mode manual targets allow 1 to 30 s. Alt-azimuth only; CovalENS mosaic gives 3.2° × 3.2° at 50 MP. Optional clip-on Vaonis filters: dual-band, light-pollution (CLS) and solar.
Longer subs matter most under dark skies, where read noise rather than skyglow sets the floor. From a city the difference between 10 s and 30 s subs is small; from a rural site it can halve the total time, especially with a dual-band filter in place.
Stack across nights. Every smart scope app can continue a stack or you can combine the saved frames on a computer; the figures here are totals, not single-session limits.
Have an image of the M56 from a Vespera Pro 2? Email it with your total time and sky to [email protected] and it goes here, credited.
Same target, other telescopes
- M56 with the ZWO Seestar S50: 41 min from Bortle 6
- M56 with the ZWO Seestar S50 Pro: 44 min from Bortle 6
- M56 with the ZWO Seestar S30: 43 min from Bortle 6
- M56 with the ZWO Seestar S30 Pro: 47 min from Bortle 6
- M56 with the DwarfLab DWARF 3: 59 min from Bortle 6
- M56 with the DwarfLab DWARF mini: 40 min from Bortle 6
- M56 with the DwarfLab Draco: 33 min from Bortle 6
- M56 with the DwarfLab DWARF II: 2 h 17 min from Bortle 6
- M56 with the Vaonis Vespera II: 41 min from Bortle 6
- M56 with the Vaonis Vespera Pro: 1 h 31 min from Bortle 6
- M56 with the Vaonis Vespera 3: 39 min from Bortle 6
- M56 with the Unistellar eQuinox 2: 36 min from Bortle 6
- M56 with the Unistellar Odyssey: 2 h 44 min from Bortle 6
- M56 with the Celestron Origin: 11 min from Bortle 6
- M56 with the Celestron Origin Mark II: 15 min from Bortle 6
All telescopes for the M56 · All targets for the Vespera Pro 2