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

Vaonis Vespera Pro 2 against Unistellar Odyssey, 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 Vespera Pro 2 is 1.9× faster (geometric mean of the solid-image times, each scope on its recommended filter and default subs). From a rural Bortle 3 sky the Vespera Pro 2 is 3.0× faster.

Field of view. The Vespera Pro 2 shows 1.65° × 1.65° against 0.75° × 0.56°, so big targets such as the Andromeda Galaxy, the North America Nebula and the Pleiades fit with room to spare where the Odyssey needs a mosaic or a tight crop.

Detail. The Odyssey samples at 0.93″ per pixel against 1.68″, so it pulls finer structure from small targets: planetary nebulae, globular cores, galaxy arms.

Subs and dark skies. The Vespera Pro 2 goes up to 30 s subs in Expert Mode, the Odyssey tops out at 4 s. That matters little from a city, where skyglow sets the floor, and a lot from a dark site, where read noise does.

Filters. Neither has a built-in dual-band filter, so emission nebulae from a lit sky are slow going on both.

Specifications side by side

Timed on the same targets

Suburban sky (Bortle 6)

Rural sky (Bortle 3)

Try the Vespera Pro 2 in the calculator Try the Odyssey

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.

About the Unistellar Odyssey

Unistellar’s compact 85 mm with autofocus and tiny pixels. Sharp, but the fine sampling costs time on faint extended targets. The Odyssey Pro is the same telescope with an eyepiece added, so these figures apply to both.

Other comparisons

All comparisons · Buying guide · Vespera Pro 2 page · Odyssey page