Which SV503 did I review, the 70ED or the 80ED?

The 70 mm f/6 SV503 70ED, SKU F9359A, with a 420 mm focal length: the smallest model of the SVBONY range when I reviewed it. The plate solves of my stacks put the focal length at 419 mm.

Is the SVBONY SV503 70ED still sold?

SVBONY has replaced it: svbony.com now sells the SV503 70 flat-field, a 474 mm f/6.78 design with a two-element corrector in the tube, at $525. The original f/6 is still in stock at World of Telescopes in the UK at £380.

Does the SV503 70ED show chromatic aberration?

You've probably already noticed how many of these stars have thick blue-magenta rings on the outside of them. This is due to chromatic aberration, and it's a running theme throughout the images captured with this telescope, and although I find it to be a fairly big issue, it's something that can be simply resolved in post-processing. The Celestron 63ED showed none on my Pleiades image.

Does the SV503 70ED need a field flattener?

SVBONY pairs the f/6 with 1/2 or 1/3 inch sensors and suggests its SV193 reducer-flattener for a large chip, with the stacked edges cropped. On the IMX585 sensor behind every stack on this page (11.1 x 6.3 mm) the corner stars came out only slightly larger than the centre ones: a flux-weighted radius of 3.7 px against 3.6 px on M27, and 3.7 px against 3.4 px on the Western Veil, with axis ratios of 1.14 to 1.15 against 1.11.

How does the SV503 70ED compare with the Celestron 63ED?

The 63ED gives the cleaner star colour, while the SV503's extra 6.5 mm of aperture shows a little more detail on Andromeda; the two frames sit side by side in the Versus section.

How heavy is the SV503 70ED, and what mount does it need?

SVBONY states 2.22 kg for the tube, light enough for a star tracker: my DSLR images were taken with it on a Sky-Watcher Star Adventurer 2i, and my astro-camera stacks on a ZWO AM5.

How much does the SV503 70ED cost?

World of Telescopes lists the original f/6 at £380 in the UK; Camera Concepts & Telescope Solutions has it in the US at $409, on backorder; SVBONY's own store now sells only the newer flat-field version at $525. Earlier prices: £318 on SVBONY's own site when I made my review in 2023, and about £279 in the UK in November 2024.

What have I not tested on the SV503 70ED?

I did not use it visually at an eyepiece, did not try SVBONY's SV193 reducer-flattener or a full-frame camera on it, and did not weigh the tube myself.

SVBONY SV503 70ED review: a small ED refractor that delivers

Where does it rank on our leaderboard

Nine of the 42 telescopes on my board, against price
Rank	Telescope	Stars for Your Buck	Recorded UK price
1	Askar 50P	95 out of 100	£299
2	ToupTek Hope D60	93 out of 100	£749
3	Sky-Watcher HAC125DX	92 out of 100	£589
18	Celestron C11 EdgeHD	75 out of 100	£4,845
30	SVBONY SV503 70ED	64 out of 100	£380
32	Sky-Watcher HAC125	61 out of 100	£405
35	Celestron 8 inch RASA	53 out of 100	£2,595
41	Celestron 114 LCM	42 out of 100	£361
42	Celestron AstroMaster LT 76	13 out of 100	£200

Contents

01 Where does it rank on our leaderboard
02 Specifications and features
03 In the hand
04 From the review video
05 How good is it? Here's what I captured
06 Raw against finished
07 The rig on the mount
08 What is it for
09 Versus the Celestron 63ED
10 Watch the review
11 Tested numbers and the download
12 Should you buy it?
13 Questions and more about this review

In 30 seconds

Stars for Your Buck 64/100

Reviewed 27 Jul 2023 Updated 23 Sep 2026

Rank: #30 of 42 telescopes
Verdict: Worth a look

Written by Damon Scotting 6 min read

Buy it if

You want your first imaging refractor on a small budget, light enough for a star tracker.
You image big targets like Andromeda, the Pleiades or the Veil with a DSLR or a small-sensor astro camera.
You are happy to tidy blue star halos in processing.

Skip it if

You want stars free of blue-magenta halos straight out of the stack.
You image on a full-frame or large APS-C sensor and do not want to add a flattener.
You want planets or small galaxies large in the frame: 420 mm makes them small.

This telescope is extremely well made, it comes with a dovetail bar and tube rings already attached, and you are going to be able to get some fantastic images with it.

SVBONY SV503 $525 Ad

Specifications and features

Against the telescopes I have reviewed

Compare with

SVBONY SV503 70ED reviewed #30 of 42	Askar 80ED #17 of 42	Altair 60EDF #38 of 42	Celestron 63ED #40 of 42
Recorded UK price	£380	£379	£499	£322
Stars for Your Buck	64/100	77/100	51/100	43/100
Aperture	70 mm	80 mm	60 mm	63.5 mm
Focal length	420 mm	560 mm	360 mm	381 mm
Focal ratio	f/6	f/7	f/6	f/6
Optical design	ED doublet, one S-FPL51 extra-low dispersion element, SMC multi-coated	Doublet refractor, one ED element and one standard glass element	S-FPL53 ED doublet, fully multi-coated	Doublet refractor with one ED element, fully multi-coated
Image circle	1 inch (25.4 mm)	APS-C with the optional flattener or reducers	APS-C with the optional 1.0x flattener	1 inch
Back focus	90 mm	55 mm with the optional flattener or reducers	55 mm sensor spacing with the optional reducer or flattener	not recorded
Focuser	2 inch dual-speed rack and pinion, 1:10 fine focus	dual-speed rack and pinion 2 inch focuser, 70 mm travel, with screw holes for an electronic focuser	2.5 inch dual-speed 1:10 rack and pinion, brass gear, rear camera rotator, 2 inch push-fit adapter	2 inch dual-speed 1:10 CNC-machined focuser
Weight, tube	2.22 kg	1.7 kg OTA; 2 kg gross with tube ring and dovetail plate	about 1.5 kg including rings and rear camera rotator	about 2.5 kg with accessories
Length, tube	318 mm, dew shield retracted	404 mm dew shield contracted; 505 mm dew shield extended	230 mm dew shield retracted; 300 mm extended	not recorded
Dew shield	Retractable	Retractable	Retractable	Retractable
In the box	Tube rings, 150 mm dovetail plate, 2 inch to 1.25 inch eyepiece adapter, lens cover, 1.25 inch dust cover	80ED OTA with tube ring and dovetail plate (counted in the 2 kg gross weight), 2 inch rear adapter, user manual	OTA with retractable dew shield, optical test report, dual-speed focuser with camera rotator, 2 inch push-fit adapter, X-rings with quick-release clamp, 200 mm dovetail bar, top handle rail, lens cap and dust plug	Tube rings, Vixen dovetail bar, mounting screws

In the hand

Six photographs

From the review video

Two frames from my video

Orion Nebula and the Running Man, 9 x 20 s, Canon 550D

Andromeda Galaxy with M32 and M110

How good is it? Here's what I captured

Four targets

M 27 Dumbbell Nebula, SVBONY SV705C

Integration: 1 h 8 min (68 x 60 s)
Field: 1.5 x 0.8 degrees
Telescope: SVBONY SV503 70ED
Camera: SVBONY SV705C
Mount: Sky-Watcher Star Adventurer 2i
Target: M 27 Dumbbell Nebula
Type: Planetary nebula
Location: Bortle 6.8 (in my garden)

M 31 Andromeda Galaxy, SVBONY SV705C

Integration: 1 h 30 min (90 x 60 s)
Field: 1.5 x 0.8 degrees
Telescope: SVBONY SV503 70ED
Camera: SVBONY SV705C
Mount: Sky-Watcher Star Adventurer 2i
Target: M 31 Andromeda Galaxy
Type: Galaxy
Location: Bortle 6.8 (in my garden)

NGC 6960 Western Veil, SVBONY SV705C

Integration: 30 min (30 x 60 s)
Field: 1.5 x 0.8 degrees
Telescope: SVBONY SV503 70ED
Camera: SVBONY SV705C
Mount: Sky-Watcher Star Adventurer 2i
Target: NGC 6960 Western Veil
Type: Supernova remnant
Location: Bortle 6.8 (in my garden)

M 13 Hercules Cluster, SVBONY SV705C

Integration: 1 h 2 min (62 x 60 s)
Field: 1.5 x 0.8 degrees
Telescope: SVBONY SV503 70ED
Camera: SVBONY SV705C
Mount: Sky-Watcher Star Adventurer 2i
Target: M 13 Hercules Cluster
Type: Globular cluster
Location: Bortle 6.8 (in my garden)

Raw against finished

The rig on the mount

The 3 targets, the raw combined stack against my finished image, each with its integration, the camera and the palette:

M 27 Dumbbell Nebula: 1 h 8 min (68 x 60 s) of light, SVBONY SV705C, the raw combined stack with one automatic stretch
M 13 Hercules Cluster: 1 h 2 min (62 x 60 s) of light, SVBONY SV705C, the raw combined stack with one automatic stretch
NGC 6960 Western Veil: 30 min (30 x 60 s) of light, SVBONY SV705C, the raw combined stack with one automatic stretch

On the TeSeek 11, then on six other mounts

What is it for

Four things it is for

Rings and dovetail fitted

It comes with a dovetail bar and tube rings attached already, which makes it super easy to mount the telescope immediately after unpacking it.

Dual-speed focuser

The big focuser knob makes the coarse adjustments, and the golden dial on the end fine-tunes it very slowly, so I can really get those pinpoint stars that make nebula images that much sharper.

Light enough for a tracker

It is fairly lightweight, which means it can go on a small tracking mount like this Sky-Watcher Star Adventurer 2i, and I can move it around the garden easily, unlike the heavy steel tube of a 10 inch Newtonian.

Stacking brings out the detail

It is not a case of take one image, perfect, done: the more images you stack on top of each other, the better the final product, and I stack them in the free DeepSkyStacker on a bog-standard laptop.

Versus the Celestron 63ED

M 31 Andromeda Galaxy on both, plate-solved and star-aligned (residual 0.20 px per 1000)

The same target on the Celestron 63ED
Target	Telescope	Integration	Subs	Filter	Nights
M 31 Andromeda Galaxy	SVBONY SV503 70ED + ASI585MC	90 min	90 x 60 s	not recorded	2024-08-21
M 31 Andromeda Galaxy	Celestron 63ED + ASI183MC	not recorded	not recorded	not recorded	2024-11-13, 2024-11-14

Watch the review

How GOOD is a $380 Refractor Telescope? (Svbony 503 Review) · published 27 July 2023 · 9:22 · Watch on YouTube · 40,248 views, 1,186 likes on 2 Oct 2026

Jump to

0:30 Rings and dovetail fitted
1:02 A budget rig: a Canon 550D and a star tracker
1:47 Images
3:02 The Orion Nebula
3:27 The Pleiades
4:26 Stacking in DeepSkyStacker
5:22 Finding the Andromeda Galaxy
7:30 Key features
8:10 Light enough to carry
8:38 Verdict

Transcript of the review video 1,698 words · 11 chapters · searchable

Press a time stamp to play from there.

0:00 Introduction

0:02 okay so this is the telescope we're going to be looking at tonight in this gorgeous weather it is the SVBONY 70 millimetre refractor telescope 0:09 okay so first things first 0:16 this is the smallest model of their latest range and it can be purchased on their official website for as little as 317 Great British pounds as 0:24 you can tell it's a very small telescope but don't let that deceive you as much like a neutron star it is quite dense the telescope is extremely well made

0:30 Rings and dovetail fitted

0:32 excusing the spelling error on the front it comes with a dovetail bar and Tube Rings attached already making it super easy to mount your telescope immediately 0:40 after unpackaging it it also comes with a number of accessories such as a finder scope and some eyepieces they have also sent alongside it a Canon EOS camera 0:49 mount and tube converter this makes it possible to use your DSLR camera for Imaging my first impressions were that this was a very neat telescope if the 0:57 images it takes are half as good as it looks and feels then we are surely on to a winner I did try and cut them some slack I have

1:02 A budget rig: a Canon 550D and a star tracker

1:04 tried my best to use the most reasonably priced and budget-friendly accompanying equipment as possible that is a used Canon 550D at around 80 British 1:14 pounds and a Sky-Watcher tracking Mount at 300 pounds new so when you bundle all of this together your total cost for a very nice 1:21 astrophotography setup is just under 700 pounds there are of course extras You may wish to purchase alongside these because you're a fairly smart person, top of your list would 1:33 perhaps be a 10 pound shutter release cable so that you can take images without having to hold a glove in front of a telescope for the first three 1:39 seconds of every long exposure to reduce the effect of the vibrations caused by you pressing the shutter button on the camera yeah it was a long night okay I

1:47 Images

1:48 think I finally got it set up and taken images and the first star I've pointed at wasn't on purpose but it happens to be the most left star in Orion's Belt 1:58 which is where the Horsehead Nebula is located right now I've managed to pick it up immediately the Flame Nebula which is fantastic I say you want to kick 2:08 things off I'm going to kick things off with the best objects and if you hear rustling sound on the floor right now by the way that's my dog Max he's just 2:15 taking a poo which will soon be frozen by the way almost immediately so I'll put the glove over on a telescope because the first second I pressed the 2:22 camera shutter it's going to vibrate a little bit and in the image itself gets a long exposure it caused the Stars to all Shake a tiny bit hopefully that's 2:30 been avoided so I'm getting some good shots of the Flame Nebula it is minus six degrees out here now so I don't want to spend all night image in the same 2:37 Target you are going to be able to get some fantastic images with this and with most of the things in astrophotography the more time you put into it the better it 2:45 becomes it's it's not a case of take one image perfect done like the more images you stack on top of each other the better the final product 2:54 time is of the essence here though because I'm starting to lose the feeling in my toes and I do have a lot that I 3:00 want to get through tonight I'm shooting the flame everywhere now I'm gonna go for the Orion Nebula straight after this all right I'm just going to take one

3:02 The Orion Nebula

3:16 more image and then I'm going to move on to a different Target now so I've done the Flame Nebula and I'm hoping Horsehead nebula I've done the Orion 3:25 Nebula and now I'm going to move on to I'm going to go for the Pleiades just for Simplicity the Pleiades is just straight up there which makes it a lot

3:27 The Pleiades

3:33 easier and then if I have enough time and haven't frozen to death I will try and rotate it that way and look for an Andromeda Galaxy glove 3:42 in front of camera I'm sure it's a button pressed down on the 30 second exposure and taken away so I think the entire Pleiades cluster fits in perfectly 3:51 within this Frame shot here which is a testament to the actual focal length of this because it may be perfect for Imaging this object normally it's a 3:59 trade-off with the Pleiades you normally see only a few of the stars at once because you're zoomed in so much but we may be able to see all seven it's not 4:07 seven there's a lot more than seven oh wow yes there are a lot more than seven yeah I mean in that shot just there 4:14 there's at least 100 Stars a hundred stars in that image you could faintly make out the dust clouds in the Pleiades so I'm going to see if we can bring more 4:23 of that detail out by taking more exposures and then later on stacking them in a freeware known as DeepSkyStacker so not adding any expense to the

4:26 Stacking in DeepSkyStacker

4:33 budget you just need a bog standard laptop with fairly simple capabilities it's nothing Advanced to take all these images put them on top of each other 4:43 and create one masterpiece okay yeah so we might have to move ourselves slightly in order to accommodate for the fact that we can't see the Andromeda Galaxy it will 4:58 literally be a case of just moving it about six foot that way to avoid the trees just there so we've done all the cool stuff behind me 5:06 just there we've done Flame Nebula Horsehead nebula Orion Nebula and all the up there the Pleiades I don't know how well you can make it out right now 5:13 but that's the Orion Nebula or the constellation of Orion sorry just behind me over there I am now going to adjust the setup here 5:21 and point it up there towards the Andromeda Galaxy you can use really helpful tools like Stellarium on your phone in order to pinpoint exactly where

5:22 Finding the Andromeda Galaxy

5:31 it is the object you're looking for but as someone with 10 years of experience now I'm just gonna eyeball it and hope for the best 5:40 that's not very scientific all right I'm gonna regret going on my knees that's what he said because that's how it really gets us how the cold really 5:49 kills you is when you let it touch a part of your clothing that then sort of soaks or becomes a lot more temperature words yep Cold's got to me now yeah so 6:03 it turns out I actually had covid at this point and although I'm not an actual doctor I'd like to offer you some free medical advice and that is 6:09 regardless of your current health situation try your best to avoid being outside in below freezing temperatures for more than five minutes let alone for 6:18 hours and this is a big part of the reason as to why this video is being posted seven months late all right so I'm going in blind I'm going to be 6:26 looking through the viewfinder just here here Andromeda is a tricky one because it's not a star like object it is a sort of faint blurry patch of light but it's 6:37 not impossible to find I just want to make sure this is in fact looking at the Galaxy and boy oh boy it is that's nice 6:46 that's very nice so press the shutter remove the glove say hi to a dog hey bud oh yeah you're nice and warm yeah good boy okay and then hopefully this 7:04 shot of Andromeda Galaxy looks really nice and I only have to take one or two because if I take one or two shots get 7:10 them in the bag perfect I can call it a night head inside and then me and Max can watch some TV beautiful absolutely beautiful that shot

7:30 Key features

7:35 one of the key features that you'll see on here is that we have a dual speed focuser so most telescopes sorry all telescopes will have a focuser just like 7:41 this quite a big one which allows you to make adjustments in terms of the focus but then there's golden dial on the end just here allows you to fine tune it 7:49 which allows you to very slowly adjust it and really get those pinpoint stars that make the astrophotography images that much more spectacular and when it 7:58 comes to Imaging stuff like nebula we want the picture to be as sharp as possible and that golden dial there will allow us to do so so it's very handy you 8:07 can see me moving around quite easily just here and that is because it's fairly lightweight I think it weighs about four kilograms which means

8:10 Light enough to carry

8:15 it is possible for it to go on a mount just like this one here I've spent many nights in this exact Garden where I've 8:20 had a 10 inch Newtonian which I had to take inside and as you pick up the steel tube it is very cold it's very cold it's 8:30 quite heavy and it's not exactly Nimble you have to carry it like this and carefully walk like a penguin in order to avoid falling over yeah so overall

8:38 Verdict

8:40 very impressive telescope and I'm going to carry on monitoring SVBONY's products going forward because they are relatively new to the game the main leading telescope companies as far as 8:48 I've been aware growing up have always been Celestron, Meade and Sky-Watcher so now we have someone new to the game that is bringing in very good products at a 8:57 very good price so it's exciting looking forward to see what else they might bring to the game right I think I'm about to do it I'm Damon Scotting and 9:06 this was an astronomical review

Check out more videos on the SVBONY SV503 70ED

Is this the BEST Telescope to buy for under £300?

19 Nov 2024

Tested numbers and the download

Finished image

Licence: for personal use, credit Damon Scotting. Both JPEGs 3,718 x 2,078 px.

+17 C sensor temperature during imaging

419 mm focal length, plate solved SVBONY states 420 mm

1.52 x 0.86° field of view 3,840 x 2,160 px on ASI585MC

8.3 MP ASI585MC 3,840 x 2,160 px, 11.1 x 6.3 mm

Should you buy it?

64/100 Stars for Your Buck

Pros

The dual-speed focuser has a golden dial that fine-tunes the focus very slowly, so I can really get those pinpoint stars.
It is small and light: 318 mm long with the dew shield retracted, and 2.22 kg by SVBONY's figure.
At 420 mm the entire Pleiades cluster fits perfectly within the frame of a DSLR, and so does Andromeda with both of its companions.
The telescope and camera did a surprisingly good job on the Dumbbell Nebula in 68 one-minute exposures.
“On Andromeda it just pips the Celestron 63ED for detail.”

Cons

Chromatic aberration puts thick blue-magenta rings around many stars, so the star colour needs work in processing.
The stars come out large in every image, so deconvolution goes a long way to making them look sharper.
There is no flattener in the tube: for a large sensor SVBONY suggests its SV193 reducer-flattener, an extra purchase.
SVBONY has replaced it: svbony.com now sends you to the SV503 70 flat-field, a 474 mm f/6.78 design, so the original f/6 is only sold where retailers still have stock.

Overall, very impressive telescope, and I'm going to carry on monitoring SVBONY's products going forward because they are relatively new to the game.

Who the SV503 70ED is for

Beginner on a small budget

Buy

For a first imaging refractor on a small budget, my recommendation is the SV503, as long as you are happy to tidy the star colour in processing.

DSLR owner with a star tracker

Buy

With a Canon EOS adapter on the focuser, a DSLR on a small star tracker frames the whole Orion Nebula.

Owner of a small-sensor astro camera

Buy

On an IMX585 camera it frames 1.5 x 0.86 degrees at 1.43 arcsec per pixel, room enough for the Dumbbell, M13 and the Western Veil.

Imager who wants colour-pure stars

Skip

My recommendation is the Askar 71F: about twice the price, and it blows the SV503 out of the water.

Full-frame camera owner

Skip

SVBONY designed this f/6 for small sensors, so a full-frame camera is the wrong partner for it.

Owner of an 80 mm ED doublet

Skip

Moving from a scope like the Askar 80ED gains nothing: the SV503 is 10 mm smaller and shorter in focal length.

Three alternatives I have reviewed

Questions and more about this review

Reviewed by

Damon Scotting

The Telescope Man Verified

BSc (Hons) Physics with Astrophysics and Cosmology, Loughborough University PGCE / QTS, University of Nottingham

About Damon About Damon Damon Scotting is The Telescope Man. He holds a BSc (Hons) in Physics with Astrophysics and Cosmology from Loughborough University and a PGCE with QTS from the University of Nottingham, and taught physics in secondary schools before becoming an astronomy creator. He is a contributing writer for BBC Sky at Night Magazine and the author of 42 Wonders of Our Night Sky, and his photograph of the galaxy M100 with the dwarf planet Ceres was Highly Commended in the Astronomy Photographer of the Year 2024 competition run by Royal Observatory Greenwich. He has appeared on the BBC's Blue Peter. More than 750,000 people follow his astronomy channels on YouTube, Instagram and TikTok, and he has reviewed more than 140 telescopes, mounts, cameras, filters and accessories hands-on for this site. More about Damon · How I test · Damon's book

I review all kinds of gear: most of it I buy, some is gifted and some is loaned, and all of it is reviewed the same way. How this site is funded

Eight questions, answered

Questions about the SVBONY SV503 70ED

Reviewed 27 July 2023 ·Updated 23 September 2026

I review all kinds of gear. Most of it I buy, some is gifted and some is loaned, and all of it is reviewed the same way: no company sees or approves a review before it is published. Shop links marked Ad are affiliate links: I earn a commission when you buy through them, at no extra cost to you. How this site is funded

Which SV503 did I review, the 70ED or the 80ED? The 70 mm f/6 SV503 70ED, SKU F9359A, with a 420 mm focal length: the smallest model of the SVBONY range when I reviewed it. The plate solves of my stacks put the focal length at 419 mm. Tested numbers and the download ↓
Is the SVBONY SV503 70ED still sold? SVBONY has replaced it: svbony.com now sells the SV503 70 flat-field, a 474 mm f/6.78 design with a two-element corrector in the tube, at $525. The original f/6 is still in stock at World of Telescopes in the UK at £380. The verdict, the readers and the sellers ↓
Does the SV503 70ED show chromatic aberration? You've probably already noticed how many of these stars have thick blue-magenta rings on the outside of them. This is due to chromatic aberration, and it's a running theme throughout the images captured with this telescope, and although I find it to be a fairly big issue, it's something that can be simply resolved in post-processing. The Celestron 63ED showed none on my Pleiades image. From my video review The raw stacks against the finished images ↓
Does the SV503 70ED need a field flattener? SVBONY pairs the f/6 with 1/2 or 1/3 inch sensors and suggests its SV193 reducer-flattener for a large chip, with the stacked edges cropped. On the IMX585 sensor behind every stack on this page (11.1 x 6.3 mm) the corner stars came out only slightly larger than the centre ones: a flux-weighted radius of 3.7 px against 3.6 px on M27, and 3.7 px against 3.4 px on the Western Veil, with axis ratios of 1.14 to 1.15 against 1.11. The raw stacks against the finished images ↓
How does the SV503 70ED compare with the Celestron 63ED? The 63ED gives the cleaner star colour, while the SV503's extra 6.5 mm of aperture shows a little more detail on Andromeda; the two frames sit side by side in the Versus section. Versus the Celestron 63ED ↓
How heavy is the SV503 70ED, and what mount does it need? SVBONY states 2.22 kg for the tube, light enough for a star tracker: my DSLR images were taken with it on a Sky-Watcher Star Adventurer 2i, and my astro-camera stacks on a ZWO AM5. The rig on the mount ↓
How much does the SV503 70ED cost? World of Telescopes lists the original f/6 at £380 in the UK; Camera Concepts & Telescope Solutions has it in the US at $409, on backorder; SVBONY's own store now sells only the newer flat-field version at $525. Earlier prices: £318 on SVBONY's own site when I made my review in 2023, and about £279 in the UK in November 2024. The verdict, the readers and the sellers ↓
What have I not tested on the SV503 70ED? I did not use it visually at an eyepiece, did not try SVBONY's SV193 reducer-flattener or a full-frame camera on it, and did not weigh the tube myself.