How long to image the NGC 6914 with the Vaonis Vespera 3
From a Bortle 6 suburban sky, the Vaonis Vespera 3 needs about 5 h 48 min (2,087 subs of 10 s) for a solid image of the NGC 6914. A quick look takes 1 h 27 min; a showpiece 23 h. Under a Bortle 3 rural sky the solid figure drops to 2 h 08 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 7% 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 | 27 min161 subs | 1 h 47 min642 subs | 7 h 08 min2,567 subs |
| Bortle 2Typical dark site | 29 min172 subs | 1 h 54 min686 subs | 7 h 37 min2,744 subs |
| Bortle 3Rural | 32 min193 subs | 2 h 08 min770 subs | 8 h 33 min3,080 subs |
| Bortle 4Rural / suburban transition | 41 min244 subs | 2 h 42 min974 subs | 11 h3,894 subs |
| Bortle 5Suburban | 54 min324 subs | 3 h 36 min1,296 subs | 14 h5,183 subs |
| Bortle 6Bright suburban | 1 h 27 min522 subs | 5 h 48 min2,087 subs | 23 h8,346 subs |
| Bortle 7Suburban / urban transition | 2 h 30 min899 subs | 9 h 59 min3,594 subs | 40 h14,373 subs |
| Bortle 8City | 4 h 07 min1,484 subs | 16 h5,933 subs | 66 h23,730 subs |
| Bortle 9Inner city | 7 h 35 min2,731 subs | 30 h10,922 subs | 120+ h43,688 subs |
Power and kit for this session
Allowing for slewing, focusing and rejected subs, that is about 7 h 32 min of run time. That is more than one night: over 2 nights, about 3 h 46 min each. The Vespera 3’s battery (rated about 11 h) should cover each night; 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 30WVaonis says an external bank extends sessions; 30 W PD as for the II and Pro.
- red LED head torchRed light keeps your night vision; white light costs you twenty minutes of dark adaptation every time.
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How it frames
The NGC 6914 is 6′ across. The Vespera 3 frames 2.60° × 1.46° at 2.44″ per pixel, so it fills 7% 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 widens the field to 4.3° × 2.4°. Time for a solid image by sub length:
| Sub length | Bortle 3 | Bortle 5 | Bortle 7 |
|---|---|---|---|
| 10 s | 2 h 08 min770 subs | 3 h 36 min1,296 subs | 9 h 59 min3,594 subs |
| 20 s | 1 h 49 min326 subs | 3 h 16 min589 subs | 9 h 39 min1,738 subs |
| 30 s | 1 h 42 min205 subs | 3 h 10 min380 subs | 9 h 33 min1,146 subs |
About the NGC 6914
Blue reflection patches floating on a sea of red hydrogen in Cygnus. Broadband for the blue; dual-band would remove the point.
vdB 131/132 · Reflection nebula in Cygnus · magnitude 9.0 · 6′ · best in Jul, Aug, Sep. Reachable from mid-northern latitudes (UK, northern US, central Europe) and from the south.
Reflection nebulae are starlight scattered by dust, so they are broadband and blue. A dual-band filter removes almost all of it; do not use one. These are among the faintest structures a smart scope can attempt and the figures run long. A dark sky matters more here than for any other type, and the Moon must be down.
About the Vaonis Vespera 3
The 2026 Vespera: same 50 mm quadruplet class as the II on an 8 MP IMX585, with a 24 MP mosaic mode and 11 hours of battery. Per pixel it behaves like a Seestar S50 Pro without the built-in dual-band filter.
10 s subs by default; Expert Mode manual targets allow 1 to 30 s. Alt-azimuth only; CovalENS mosaic widens the field to 4.3° × 2.4°. Optional clip-on Vaonis filters: dual-band, light-pollution (CLS) and solar. The new optical baffle is not a substitute for a CLS filter.
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 NGC 6914 from a Vespera 3? Email it with your total time and sky to [email protected] and it goes here, credited.
Same target, other telescopes
- NGC 6914 with the ZWO Seestar S50: 6 h 04 min from Bortle 6
- NGC 6914 with the ZWO Seestar S50 Pro: 6 h 38 min from Bortle 6
- NGC 6914 with the ZWO Seestar S30: 6 h 23 min from Bortle 6
- NGC 6914 with the ZWO Seestar S30 Pro: 7 h 02 min from Bortle 6
- NGC 6914 with the DwarfLab DWARF 3: 8 h 48 min from Bortle 6
- NGC 6914 with the DwarfLab DWARF mini: 6 h 02 min from Bortle 6
- NGC 6914 with the DwarfLab Draco: 4 h 59 min from Bortle 6
- NGC 6914 with the DwarfLab DWARF II: 21 h from Bortle 6
- NGC 6914 with the Vaonis Vespera II: 6 h 04 min from Bortle 6
- NGC 6914 with the Vaonis Vespera Pro: 14 h from Bortle 6
- NGC 6914 with the Vaonis Vespera Pro 2: 13 h from Bortle 6
- NGC 6914 with the Unistellar eQuinox 2: 5 h 33 min from Bortle 6
- NGC 6914 with the Unistellar Odyssey: 26 h from Bortle 6
- NGC 6914 with the Celestron Origin: 1 h 36 min from Bortle 6
- NGC 6914 with the Celestron Origin Mark II: 2 h 12 min from Bortle 6
All telescopes for the NGC 6914 · All targets for the Vespera 3