SVBony

SVBony SV550 122 APO

Name: SVBony SV550 122 APO
Brand: SVBony

An unusually large triplet for the money, and the aperture is real, but at 6.4 kg and 854 mm it demands a mount most buyers at this price do not already own.

79/ 100

Polaris Score

#3 of 7 large triplet apo

See the breakdown ↓

Aperture

122mm

Focal Length

854mm

Focal Ratio

f/7

Mount Type

None (OTA only)

Optical Design

Triplet APO

Weight

6.44 kg

From$1,599.99

$300 above 90-day low

Price tracked by PolarisObserved 9 timesTracking since Sep 2026

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Where to buy

AmazonBest price$1,599.99→SVBONYPartnerchoose “OTA” on the page$1,807.99→

Verified 8h ago · prices tracked daily

What it's built forOpen these in the simulator →

This telescope was built for sweeping wide.

A short, fast refractor with a generous true field — the whole sword of Orion in one view, star fields that spill past the field stop. It rewards low power and dark skies far more than chasing magnification.

Widest true fieldsTack-sharp to the edge

The view people remember

Andromeda, wider than the Moon.

A vast soft oval with a blazing core — two and a half million light-years of galaxy, spilling well past the field of view under a genuinely dark sky.

See Andromeda Galaxy through this telescope →

Where else it shines

Within reach

Orion Nebula

Stronger structure — embedded stars plus dark lanes within the core

Open view →

Easy first target

The Pleiades

Rich field — fainter members fill out the cluster

Open view →

Rewards a dark sky

Whirlpool Galaxy

Definite galaxy shape — core stands out against the sky

Open view →

Also excellent on

Saturn

Recognizable disk with subtle markings under steady seeing

Open view →

✦

Tight planetary detail belongs to a longer scope. This one trades reach for a breathtaking field.

01What it's good at

What it's best at — and the trade-offs.

122 mm of triplet aperture for under $2000 is a combination the established brands do not currently offer at all

Best at

✓122 mm of triplet aperture for under $2000 is a combination the established brands do not currently offer at all

✓854 mm at f/7 reaches the smaller targets an 80 mm cannot resolve: globular clusters, planetary nebulae and the brighter galaxies with actual structure

✓The same 2.5-inch dual-speed focuser as the 80 mm, which is comfortably specified for the imaging trains this scope will carry

✓It doubles as a serious visual instrument, where 122 mm of well-corrected refractor shows lunar detail and double stars that a reflector of similar cost will not match for contrast

Trade-offs

!6.44 kg is the bare OTA, and a mount that genuinely handles it for imaging is often a larger purchase than the telescope

!S-FPL51 glass is working harder at 122 mm than at 80 mm, so residual colour on the brightest stars is more visible than on an FPL53 design

!854 mm magnifies mount error as well as the target, so guiding is mandatory rather than advisable

!A large refractor takes a long time to reach thermal equilibrium, and a tube that has not cooled will not show what the optics can do

02In plain English

What These Numbers Mean

122mm · f/7 · 854mm FL

Aperture

122 mm (4.8 inch)

This is the reason to consider it. Compared to an 80 mm it gathers roughly 2.3 times the light and resolves about half again as fine, which is the difference between a galaxy as a smudge and a galaxy with visible arms. Among refractors this is a large aperture, and at this price it is close to unique.

Weight

6.44 kg (OTA only)

The specification that quietly decides the total cost. A mount rated 10 kg for visual use is not a 10 kg imaging mount, because imaging wants roughly half the rated capacity to track well. Loaded with rings, flattener, camera and guider this tube sits near 9 kg, which points at an EQ6-class or harmonic mount. Budget that before the telescope.

Focal length

854 mm

Long enough to change what you can photograph and long enough to punish an imprecise mount. Small targets like the Ring Nebula or M51 finally fill a usable part of the frame, but every arcsecond of periodic error and every minute of polar misalignment is magnified too. Guiding stops being optional at this focal length.

Focal ratio

f/7

A moderate ratio that suits the scope's dual nature. It is slow enough to be forgiving of spacing and tilt and to keep the field reasonably flat, and it gives comfortable eyepiece performance for visual use. It also means longer exposures than an f/6 for the same signal, which is another argument for a mount that tracks well.

Optical design

Air-spaced triplet, S-FPL51

The same glass recipe as the 80 mm, asked to do more. Correcting colour gets harder as aperture grows at a fixed focal ratio, so the residual violet that is barely visible on the 80 mm is more apparent here on the brightest stars. It remains a genuine apochromat and far better corrected than any achromat, but this is where the price saving shows.

Cooldown

Expect 45 to 90 minutes

A large glass objective holds heat, and until the tube reaches ambient the air inside it moves and softens the view. On the Moon at high power the difference between a cooled and uncooled tube is obvious. Set it outside when you set up the mount rather than when you start observing.

03The Polaris Score

How it scores, and why.

79/100 · #3 of 7 large triplet apo

79/ 100

SVBony SV550 122 APO

#3 of 7 large triplet apo

Performance

Ease of use

Portability

Upgrade potential

Polaris weighs optical capability, how easy the scope is to live with, how portable it is, and how far it takes you before you outgrow it — not list price or brand.

04Who it's for

An honest fit check.

An imager who already owns a mount rated well above 10 kg and wants more reach than an 80…

Buy it if you

✓An imager who already owns a mount rated well above 10 kg and wants more reach than an 80 mm gives

✓A visual observer who wants a large refractor for the Moon, planets and double stars and will not fight collimation

✓Someone with a permanent or semi-permanent setup, where the weight is paid once rather than every session

Look elsewhere if you

!Anyone whose mount is a star tracker or a light equatorial, because this will overload both and no amount of care compensates

!A first imaging telescope, since 854 mm is an unforgiving focal length to learn guiding and polar alignment on

!Anyone who needs to carry gear far from the car, as 6.44 kg of bare tube plus rings, mount and counterweights is a two-trip setup

05Build your rig

What to buy next — and where it leads.

6 pieces of gear, ordered by what changes the view most

Recommended upgrades

Widen the field for big targets★ Top pickSVBony SV193 0.8x Reducer Field Flattener

Flattens the field and shortens it to a more forgiving 683 mm at f/5.6

$107.99View details →

See wider, brighter deep-sky viewsSVBony SV106 60mm Guide Scope

At 854 mm guiding is mandatory, and a 60 mm guide scope is the right scale for this focal length

$114.29View details →

Observe all night, no AA batteriesCelestron PowerTank Lithium

A mount big enough for this tube plus a cooled camera and dew heaters needs real power all night

$99.95View details →

Growth path

Portable astrophotographyZWO AM5N Harmonic Equatorial Mount✓ Compatible

$2,299View details →

Permanent-setup astrophotographySky-Watcher EQ6-R Pro✓ Compatible

$2,250View details →

Start imagingZWO ASI2600MC Pro

$1,499View details →

Lunar & planetary

Excellent contrast

Deep-sky imaging

Strong with a flattener

Deep-sky visual

Strong

06The numbers

Full specifications.

6 measured and stated values

Optics

Optical DesignTriplet APO

Aperture122mm

Focal Length854mm

Focal Ratiof/7

Mount & drive

Mount TypeNone (OTA only)

Physical

Weight6.44 kg

07Alternatives

For a different goal, start here.

3 alternatives, each mapped to the goal it wins at

The sane starting point

SVBony SV550 80 APO

Same optical family and focuser at less than half the price and weight, and it will not force a mount upgrade. The better first triplet for almost everyone

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