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

About 4 h 38 min of total integration for a solid image, or 19 h for a showpiece. A quick look takes 1 h 09 min.

How many subs is that on the Vespera Pro?

At the default 10 s sub length, 1,667 subs for a solid image from Bortle 6 and 695 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 4 h 38 min to 3 h 20 min.

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

From a Bortle 6 suburban sky, the Vaonis Vespera Pro needs about 4 h 38 min (1,667 subs of 10 s) for a solid image of the Eastern Veil Nebula. A quick look takes 1 h 09 min; a showpiece 19 h. Under a Bortle 3 rural sky the solid figure drops to 1 h 56 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 62% of the frame’s short side.

Eastern Veil Nebula with the Vaonis Vespera Pro: 10 s subs.
Sky	Quick lookTarget obvious, still noisy	SolidClean enough to share	ShowpieceSmooth faint detail, print-worthy
Bortle 1Excellent dark site	25 min151 subs	1 h 40 min601 subs	6 h 40 min2,401 subs
Bortle 2Typical dark site	26 min159 subs	1 h 45 min633 subs	7 h 02 min2,532 subs
Bortle 3Rural	29 min174 subs	1 h 56 min695 subs	7 h 43 min2,780 subs
Bortle 4Rural / suburban transition	35 min212 subs	2 h 21 min846 subs	9 h 23 min3,381 subs
Bortle 5Suburban	45 min271 subs	3 h1,083 subs	12 h4,332 subs
Bortle 6Bright suburban	1 h 09 min417 subs	4 h 38 min1,667 subs	19 h6,667 subs
Bortle 7Suburban / urban transition	1 h 56 min695 subs	7 h 43 min2,779 subs	31 h11,115 subs
Bortle 8City	3 h 08 min1,127 subs	13 h4,506 subs	50 h18,022 subs
Bortle 9Inner city	5 h 41 min2,047 subs	23 h8,188 subs	91 h32,752 subs

Adjust in the calculator

Power and kit for this session

Allowing for slewing, focusing and rejected subs, that is about 6 h 01 min of run time. The Vespera Pro’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.)

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How it frames

The Eastern Veil Nebula is 60′ × 8′ across. The Vespera Pro frames 1.62° × 1.62° at 1.65″ per pixel, so it fills 62% 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, no EQ mode. Time for a solid image by sub length:

Sub length	Bortle 3	Bortle 5	Bortle 7
10 s	1 h 56 min695 subs	3 h1,083 subs	7 h 43 min2,779 subs
20 s	1 h 35 min287 subs	2 h 40 min481 subs	7 h 23 min1,329 subs
30 s	1 h 29 min178 subs	2 h 33 min307 subs	7 h 16 min872 subs

With and without the dual-band filter

Solid quality, default sub length.
Filter	Bortle 3	Bortle 5	Bortle 7
No filter	1 h 56 min695 subs	3 h1,083 subs	7 h 43 min2,779 subs
dual-band (Dual Band filter), clip-on	2 h 30 min902 subs	2 h 50 min1,021 subs	4 h 17 min1,540 subs

The Vespera Pro has no built-in dual-band filter. Optional clip-on Vaonis filters: dual-band, light-pollution (CLS) and solar. 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 Pro

The square-sensor Vespera with 2 µm pixels. Higher resolution than the II, and correspondingly slower per pixel: expect around double the time for the same per-pixel SNR. Run-out in 2026 and replaced by the Vespera Pro 2.

10 s subs by default; Expert Mode manual targets allow 1 to 30 s. Alt-azimuth only, no EQ mode. 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.

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Imaged the Eastern Veil Nebula with your Vespera Pro? 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 Pro? 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 Pro