How long to image the Eagle Nebula with the ZWO Seestar S30 Pro
From a Bortle 6 suburban sky, the ZWO Seestar S30 Pro needs about 1 h 14 min (442 subs of 10 s with the built-in dual-band (LP filter) filter) for a solid image of the Eagle Nebula. A quick look takes 18 min; a showpiece 4 h 54 min. Under a Bortle 3 rural sky the solid figure drops to 53 min. At Bortle 6 the limit is a mix of skyglow and read noise. In this scope's field it fills 26% 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 | 13 min77 subs | 51 min308 subs | 3 h 25 min1,229 subs |
| Bortle 2Typical dark site | 13 min78 subs | 52 min312 subs | 3 h 28 min1,246 subs |
| Bortle 3Rural | 13 min80 subs | 53 min320 subs | 3 h 33 min1,277 subs |
| Bortle 4Rural / suburban transition | 14 min85 subs | 56 min338 subs | 3 h 45 min1,352 subs |
| Bortle 5Suburban | 15 min92 subs | 1 h 01 min368 subs | 4 h 05 min1,472 subs |
| Bortle 6Bright suburban | 18 min111 subs | 1 h 14 min442 subs | 4 h 54 min1,765 subs |
| Bortle 7Suburban / urban transition | 24 min146 subs | 1 h 37 min581 subs | 6 h 27 min2,324 subs |
| Bortle 8City | 33 min200 subs | 2 h 13 min798 subs | 8 h 52 min3,192 subs |
| Bortle 9Inner city | 53 min316 subs | 3 h 30 min1,261 subs | 14 h5,043 subs |
Power and kit for this session
Allowing for slewing, focusing and rejected subs, that is about 1 h 36 min of run time. The Seestar S30 Pro’s battery (rated about 5 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 power bank 10000mAh 5V 3A5 V 3 A input and it runs while charging.
- Seestar S30 Pro dew shieldActive anti-dew is built in; a shield adds margin. The S30 Pro front differs from the S30, so check the listing.
- red LED head torchRed light keeps your night vision; white light costs you twenty minutes of dark adaptation every time.
Affiliate links: the retailer pays us a small commission and you pay the same price. These are search links to the named product, not endorsements of a particular listing; check the listing matches your model.
Everything that fits the Seestar S30 Pro →
How it frames
The Eagle Nebula is 35′ × 28′ across. The Seestar S30 Pro frames 3.99° × 2.24° at 3.74″ per pixel, so it fills 26% of the frame’s short side.
Longer subs
10, 20 and 30 s in Alt-Az; 60 s only in EQ mode, which needs the TH10 head. Time for a solid image by sub length:
| Sub length | Bortle 3 | Bortle 5 | Bortle 7 |
|---|---|---|---|
| 10 s | 53 min320 subs | 1 h 01 min368 subs | 1 h 37 min581 subs |
| 20 s | 39 min117 subs | 47 min141 subs | 1 h 22 min248 subs |
| 30 s | 34 min68 subs | 42 min85 subs | 1 h 18 min156 subs |
| 60 s | 30 min30 subs | 37 min38 subs | 1 h 13 min73 subs |
With and without the dual-band filter
| Filter | Bortle 3 | Bortle 5 | Bortle 7 |
|---|---|---|---|
| UV/IR-cut (no light-pollution filter) | 44 min263 subs | 1 h 10 min422 subs | 3 h 06 min1,118 subs |
| dual-band (LP filter) | 53 min320 subs | 1 h 01 min368 subs | 1 h 37 min581 subs |
About the Eagle Nebula
Home of the Pillars of Creation. The cluster comes fast; the pillars and surrounding nebulosity need a dual-band filter and patience.
M16, NGC 6611, IC 4703 · Emission nebula in Serpens · magnitude 6.0 · 35′ × 28′ · best in Jun, Jul, Aug. Reachable from mid-northern latitudes (UK, northern US, central Europe) and from the south.
Emission nebulae glow in a few narrow lines, mostly hydrogen-alpha (deep red) and doubly ionised oxygen (teal). A dual-band filter passes those lines and blocks most skyglow, which is why it cuts the time needed from a suburban sky so dramatically. Use it. From a genuinely dark site the gain is smaller because there is less skyglow to block, and read noise becomes the limit, which is where longer subs (EQ mode, or Expert Mode on a Vespera) earn their keep.
Stars lose colour through a dual-band filter; a short broadband stack blended in fixes that if you care.
About the ZWO Seestar S30 Pro
The S30 optics upgraded to a quadruplet in front of an 8 MP IMX585. Same speed per pixel as the S30, four times the pixels, so you can crop hard.
10, 20 and 30 s in Alt-Az; 60 s only in EQ mode, which needs the TH10 head. Built-in UV/IR-cut, dual-band (OIII 30 nm / Hα 20 nm) and dark filters on the telephoto camera.
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 60 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 Eagle Nebula from a Seestar S30 Pro? Email it with your total time and sky to [email protected] and it goes here, credited.
Same target, other telescopes
- Eagle Nebula with the ZWO Seestar S50: 1 h 01 min from Bortle 6
- Eagle Nebula with the ZWO Seestar S50 Pro: 1 h 08 min from Bortle 6
- Eagle Nebula with the ZWO Seestar S30: 1 h 11 min from Bortle 6
- Eagle Nebula with the DwarfLab DWARF 3: 1 h 16 min from Bortle 6
- Eagle Nebula with the DwarfLab DWARF mini: 1 h from Bortle 6
- Eagle Nebula with the DwarfLab Draco: 48 min from Bortle 6
- Eagle Nebula with the DwarfLab DWARF II: 5 h 25 min from Bortle 6
- Eagle Nebula with the Vaonis Vespera II: 1 h 35 min from Bortle 6
- Eagle Nebula with the Vaonis Vespera Pro: 3 h 33 min from Bortle 6
- Eagle Nebula with the Vaonis Vespera 3: 1 h 31 min from Bortle 6
- Eagle Nebula with the Vaonis Vespera Pro 2: 3 h 23 min from Bortle 6
- Eagle Nebula with the Unistellar eQuinox 2: 1 h 26 min from Bortle 6
- Eagle Nebula with the Unistellar Odyssey: 6 h 39 min from Bortle 6
- Eagle Nebula with the Celestron Origin: 25 min from Bortle 6
- Eagle Nebula with the Celestron Origin Mark II: 35 min from Bortle 6
All telescopes for the Eagle Nebula · All targets for the Seestar S30 Pro