How Many Subs

Unistellar Odyssey: how long to image deep-sky targets

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.

SpecValue
Aperture85 mm
Focal length320 mm (f/3.8)
SensorIMX415-class, 1.45 µm (Unistellar does not name it), 2890 × 2160, 1.45 µm pixels
Pixel scale0.93″ per pixel
Field of view0.75° × 0.56° (45′ × 34′)
Sub exposures4 s (default 4 s)
FiltersNo filter option; Unistellar says third-party filters cannot be fitted to the Odyssey. What the names mean.
In the calculator“No filter” is the No filter position; there is no dual-band option for the Odyssey.
Read noise used1.2 e⁻
Where to buy the OdysseyAmazon UKUnistellar UKAmazon USUnistellar USAffiliate links: As an Amazon Associate I earn from qualifying purchases, at no cost to you.

Weighing it against the others? The buying guide puts every scope on one table.

Popular targets

Total integration for a solid image, 4 s subs, recommended filter.
TargetBortle 4Bortle 6Bortle 8
Andromeda GalaxyGalaxy4 h 24 min3,964 subs6 h 07 min5,505 subs12 h10,829 subs
Orion NebulaEmission nebula50 min750 subs1 h 08 min1,016 subs2 h 09 min1,936 subs
PleiadesReflection nebula8 h 12 min7,377 subs11 h10,297 subs23 h20,387 subs
Whirlpool GalaxyGalaxy2 h 55 min2,626 subs4 h 01 min3,617 subs7 h 49 min7,040 subs
Bode's GalaxyGalaxy3 h 12 min2,876 subs4 h 25 min3,981 subs8 h 40 min7,798 subs
Pinwheel GalaxyGalaxy14 h12,667 subs20 h17,741 subs39 h35,277 subs
Hercules ClusterGlobular cluster21 min316 subs28 min419 subs52 min774 subs
Dumbbell NebulaPlanetary nebula1 h 19 min1,186 subs1 h 47 min1,601 subs3 h 22 min3,036 subs
Ring NebulaPlanetary nebula22 min327 subs28 min422 subs50 min750 subs
Lagoon NebulaEmission nebula1 h 24 min1,257 subs1 h 55 min1,719 subs3 h 41 min3,319 subs
Eagle NebulaEmission nebula4 h 47 min4,312 subs6 h 39 min5,992 subs13 h11,798 subs
Omega NebulaEmission nebula1 h 36 min1,441 subs2 h 11 min1,966 subs4 h 12 min3,780 subs
Trifid NebulaEmission nebula3 h 21 min3,022 subs4 h 39 min4,184 subs9 h 07 min8,201 subs
Triangulum GalaxyGalaxy8 h 12 min7,377 subs11 h10,297 subs23 h20,387 subs
North America NebulaEmission nebula6 h 51 min6,165 subs9 h 33 min8,594 subs19 h16,987 subs
Western Veil NebulaSupernova remnant7 h 30 min6,743 subs10 h9,406 subs21 h18,609 subs
Eastern Veil NebulaSupernova remnant6 h 16 min5,637 subs8 h 43 min7,852 subs17 h15,506 subs
Elephant's Trunk NebulaEmission nebula12 h10,574 subs16 h14,795 subs33 h29,380 subs
Iris NebulaReflection nebula5 h 44 min5,154 subs7 h 58 min7,175 subs16 h14,156 subs
Pacman NebulaEmission nebula8 h 12 min7,377 subs11 h10,297 subs23 h20,387 subs
Heart NebulaEmission nebula14 h12,667 subs20 h17,741 subs39 h35,277 subs
Rosette NebulaEmission nebula6 h 51 min6,165 subs9 h 33 min8,594 subs19 h16,987 subs
Horsehead NebulaEmission nebula9 h 49 min8,830 subs14 h12,341 subs27 h24,473 subs
Flame NebulaEmission nebula2 h 21 min2,123 subs3 h 15 min2,927 subs6 h 20 min5,706 subs
California NebulaEmission nebula9 h 49 min8,830 subs14 h12,341 subs27 h24,473 subs
Helix NebulaPlanetary nebula9 h 49 min8,830 subs14 h12,341 subs27 h24,473 subs
Double ClusterOpen cluster7 min107 subs9 min136 subs16 min237 subs
NGC 891Galaxy8 h 19 min7,481 subs12 h10,436 subs23 h20,645 subs
Sombrero GalaxyGalaxy2 h 20 min2,094 subs3 h 11 min2,865 subs6 h 09 min5,531 subs
Sunflower GalaxyGalaxy4 h 58 min4,473 subs6 h 54 min6,208 subs14 h12,203 subs

All 170 targets have a page for the Odyssey.

Every target for the Odyssey

Supernova remnants

Globular clusters

Open clusters

Emission nebulas

Star clouds

Planetary nebulas

Galaxies

Reflection nebulas

Getting the most from the Odyssey

Fixed 4 s subs in Enhanced Vision; they cannot be changed. No filter option; Unistellar says third-party filters cannot be fitted to the Odyssey.

The Odyssey uses fixed 4 s subs, so the only levers you have are the sky you shoot from, the filter, and total time.

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.

Compare the Odyssey

Useful gear

What actually fits this scope, checked against the maker's own pages: power, EQ mode, dew and carry.

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.

All Odyssey accessories, and what to take on a cold night →