How long should I image the Eastern Veil Nebula with the Vespera 3 from a Bortle 6 sky?

About 1 h 58 min of total integration for a solid image, or 7 h 54 min for a showpiece. A quick look takes 30 min.

How many subs is that on the Vespera 3?

At the default 10 s sub length, 711 subs for a solid image from Bortle 6 and 267 from Bortle 3.

Does a dual-band filter help on the Eastern Veil Nebula?

Yes. It is an emission-line object; from Bortle 6 the filter cuts the solid-image time from 1 h 58 min to 1 h 14 min.

How long to image the Eastern Veil Nebula with the Vaonis Vespera 3

From a Bortle 6 suburban sky, the Vaonis Vespera 3 needs about 1 h 58 min (711 subs of 10 s) for a solid image of the Eastern Veil Nebula. A quick look takes 30 min; a showpiece 7 h 54 min. Under a Bortle 3 rural sky the solid figure drops to 44 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 68% of the frame’s short side.

Eastern Veil Nebula with the Vaonis Vespera 3: 10 s subs.
Sky	Quick lookTarget obvious, still noisy	SolidClean enough to share	ShowpieceSmooth faint detail, print-worthy
Bortle 1Excellent dark site	9 min56 subs	37 min224 subs	2 h 29 min893 subs
Bortle 2Typical dark site	10 min60 subs	40 min239 subs	2 h 39 min953 subs
Bortle 3Rural	11 min67 subs	44 min267 subs	2 h 58 min1,066 subs
Bortle 4Rural / suburban transition	14 min84 subs	56 min336 subs	3 h 43 min1,341 subs
Bortle 5Suburban	18 min111 subs	1 h 14 min444 subs	4 h 56 min1,775 subs
Bortle 6Bright suburban	30 min178 subs	1 h 58 min711 subs	7 h 54 min2,842 subs
Bortle 7Suburban / urban transition	51 min305 subs	3 h 23 min1,219 subs	14 h4,874 subs
Bortle 8City	1 h 24 min502 subs	5 h 35 min2,008 subs	22 h8,029 subs
Bortle 9Inner city	2 h 34 min923 subs	10 h3,690 subs	41 h14,757 subs

Adjust in the calculator

Power and kit for this session

Allowing for slewing, focusing and rejected subs, that is about 2 h 34 min of run time. The Vespera 3’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 30WVaonis says an external bank extends sessions; 30 W PD as for the II and Pro.
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How it frames

The Eastern Veil Nebula is 60′ × 8′ across. The Vespera 3 frames 2.60° × 1.46° at 2.44″ per pixel, so it fills 68% 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	44 min267 subs	1 h 14 min444 subs	3 h 23 min1,219 subs
20 s	38 min114 subs	1 h 07 min202 subs	3 h 16 min590 subs
30 s	36 min72 subs	1 h 05 min131 subs	3 h 14 min389 subs

With and without the dual-band filter

Solid quality, default sub length.
Filter	Bortle 3	Bortle 5	Bortle 7
No filter	44 min267 subs	1 h 14 min444 subs	3 h 23 min1,219 subs
dual-band (Dual Band filter), clip-on	51 min308 subs	1 h362 subs	1 h 40 min600 subs

The Vespera 3 has no built-in dual-band filter. Optional clip-on Vaonis filters: dual-band, light-pollution (CLS) and solar. The new optical baffle is not a substitute for a CLS filter. On an emission target like this it is the single biggest upgrade you can make.

About the Eastern Veil Nebula

The brighter, more detailed arc of the Veil. Red hydrogen and teal oxygen filaments interleave; dual-band captures both.

NGC 6992, NGC 6995, Caldwell 33 · Supernova remnant in Cygnus · magnitude 7.0 · 60′ × 8′ · best in Jul, Aug, Sep. Reachable from mid-northern latitudes (UK, northern US, central Europe) and from the south.

Supernova remnants are emission-line objects, strong in both hydrogen-alpha and OIII, and their filaments are thin, so pixel scale matters as much as aperture. A dual-band filter is essential from any lit sky and still helps under a dark one. These are long-integration targets; plan on several sessions and stack across nights.

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.

Where to buy the Vespera 3Vaonis store Direct Amazon UK Amazon USThe Vaonis store link is a plain link; the others are affiliate links. As an Amazon Associate I earn from qualifying purchases, at no cost to you.

Imaged the Eastern Veil Nebula with your Vespera 3? Did the solid figure match?Anonymous, one tap. It is how the model gets calibrated.

Have an image of the Eastern Veil Nebula from a Vespera 3? Email it with your total time and sky to [email protected] and it goes here, credited.

Same target, other telescopes

All telescopes for the Eastern Veil Nebula · All targets for the Vespera 3