Seestar S30 Pro vs Vespera Pro 2: which is faster for deep-sky imaging?

ZWO Seestar S30 Pro against Vaonis Vespera Pro 2, on the same targets from the same skies, using the same photon-budget model as the rest of the site. Times are for a solid image; the calculator gives quick-look and showpiece figures too.

Speed. Across the 30 most popular targets from a suburban Bortle 6 sky, the Seestar S30 Pro is 2.3× faster (geometric mean of the solid-image times, each scope on its recommended filter and default subs). From a rural Bortle 3 sky the Seestar S30 Pro is 1.7× faster.

Field of view. The Seestar S30 Pro shows 3.99° × 2.24° against 1.65° × 1.65°, so big targets such as the Andromeda Galaxy, the North America Nebula and the Pleiades fit with room to spare where the Vespera Pro 2 needs a mosaic or a tight crop.

Detail. The Vespera Pro 2 samples at 1.68″ per pixel against 3.74″, so it pulls finer structure from small targets: planetary nebulae, globular cores, galaxy arms.

Subs and dark skies. The Seestar S30 Pro goes up to 60 s subs in EQ mode, the Vespera Pro 2 tops out at 30 s. That matters little from a city, where skyglow sets the floor, and a lot from a dark site, where read noise does.

Filters. The Seestar S30 Pro has a dual-band filter built in; the Vespera Pro 2 does not, which costs it heavily on emission nebulae from any suburban sky.

Specifications side by side

Timed on the same targets

Suburban sky (Bortle 6)

Rural sky (Bortle 3)

Try the Seestar S30 Pro in the calculator Try the Vespera Pro 2

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.

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.

Other comparisons

All comparisons · Buying guide · Seestar S30 Pro page · Vespera Pro 2 page