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SVBONY SV503 Telescope ED 70mm F6 Extra Low Dispersion Refractor OTA for Astrophotography

  • High-Quality Optics: SV503 Telescope’s objective lens features an S-FPL51 extra-low dispersion glass ED element, which virtually eliminates chromatic aberration;
  • Doublet Air-Spaced Achromatic Design: The 2-element objective lens provides sharp and high-contrast images for travel and mobile use;
  • 2-Inch Rack and Pinion: The 2 inch RAP focuser securely holds heavy photographic accessories, providing smooth and precise focusing;
  • Versatile for All Users: While perfect for experienced observers, the SV503 is also an excellent choice for beginners, offering authentic, high-quality images for more discerning astronomers;
  • Area of application: You can apply SV503 OTA to astrophotography, moon,nature observation, nebulae and galaxies.

Note: The SV503 70ed is designed with f/6 focus ratio. When reducing the focus further, the image quality will not be guaranteed. This is why 0.8x flat field is not available. 


SVBONY SV503 70F6 ED Doublet Astronomy Photography Telescope

S-FPL51 glass

Dual-Speed Rack & Pinion Focuser

1:10 focuser

Back Focus 90mm

90mm Back Focus

1.97 Arc-second Resolution

Compatible Adapter 1.25/2inch

1.25/2 inch interface

Metal Hoop With Dovetail

 

Specifications

Brand SVBONY 
Product Name SV503 70F6 ED Astronomy Telescope
Type Refractor
ED Glass S-FPL51
Coating SMC
Aperture 70mm / 2.75-Inch
Focal length 420mm
Focal Ratio f/6
Type of Focuser RAP (Rack and Pinion)
Gear Reduction 1:10 Fine movement
Resolving capacity 1.97"
Limit value 11.3
Light gathering capacity 100x
Max. Useful magnification 140x
Tube weight 3240g
Tube outer diameter 88mm
Tube material Aluminium
Back Focus Length 90mm
OTA Length 318mm
Dovetail & Ring Yes
Dovetail Length 150mm
Product Dimensions 420mm*250mm*195mm

Features

1. The appearance of the telescope is baked with high-end fine-grained paint, with exquisite appearance and delicate feel;
2. The objective lens features an S-FPL51 extra-low dispersion glass ED element, which eliminates chromatic aberration. This results in the best color correction for an ED doublet lens
3. The lens adopts optical processing and low polishing technology, which is carefully carved;
4. The deceleration ratio of the two-speed 2'' toothed focusing seat is 1:10, which makes it easy to achieve accurate focus;
5. If the 70ED is matched with a large chip, A possible way is to: The SV193 increases the field of view of the shot, which is sufficient for most DSOs. The stacked image edges may need to be cropped in the post-process to improve image quality.

The Real Shot Image by SV503 70mm ED Telescope

I owned a 102/1000 mm F10 Bresser achromat for some time, now I purchased the Svbony 102mm ED FPL51 and its significaltly better with a lot less chromatic aberrations. I like this refractor a lot, especially because it's sold for an excellent price

I have the the 80mm version of this scope. I think for the price it's very good. It's not as good as a triplet but the difference is not big, mainly slight halos on bright stars. It's well built and nice to use. I have the reducer for it as well. It's my go to scope and I really like it.

This is the exact telescope I use with an ASI2600MC. With a 0.8X FF/FR and a Pegasus Focus Cube, this was the best rig I could afford.

I have the 102 and the 70 and I love them! Glad at got them before the tariff war being in the states!

I purchased the 503 102ed during the Black Friday sale with competitive price. Thanks svbony. I can proceed my hobby.

I got one sv503 telescope a few months ago. Pretty happy with it.

I use the SV503 70 ED. For around 300 dollars it's been an absolutely amazing scope, I've managed to produce some good images with it. I know a doublet isn't for everyone, but on a budget, it's minimal quality sacrifice for saving a couple hundred bucks instead of a triplet in my opinion.

This is the first new telescope I've ever brought and it is perfect at the box my only issue is the dovetail is just a little bit small full telescope over wise performs perfectly to this day and I would have had it a year in November I need to used pretty much every week and lives outside permanently

i have the 503, 102 for a few years now and i really like it, i use it with my asi 585 and it produces images i am happy with for the price of the setup. it seems to be a good match for a smaller censor i think most people buying a cheaper beginner telescope like this are not going to have an expensive apc sized cooled camera anyway. the chromatic aberration is a pain but it can mostly be sorted out in pixnsight.

This 102mm f/7 ED refractor is worth well more than I paid for it! The first time I took it out for a night of observing the sky, the sharp, contrasty views of star clusters and nebulae impressed me and my observing buddies. They spent as much time looking through this scope as through their own, much larger, reflector telescopes. The objective lens gives wonderful views. The "mechanics" of the scope are well-made and put together, including the retractable dew/light shield at the lens end and the rotating focuser assembly at the eyepiece end. Two small quibbles: The main focuser is a bit tight to turn, but another owner tells me it will loosen as I use the fouser. (The fine-focuser worked very well right out of the box!) There was no user manual or documentation include with the telescope. But I found some pages of information and directions, particularly about the focuser, at a Svbony page online. I plan to use this refractor purely for observing, not astro-imaging.

The image of the Moon is a composite made from two images taken with the SvBony SV305 camera then stitched together for the full image. It created some excitement on Facebook as it shows a lot of detail you would not expect from a telescope of this size. The image of Venus was also taken with the SV305 camera. The third image of the solar prominence was taken with a 4x Powermate Barlow, a Daystar Quark Hydrogen-Alpha filter and a QHY174GPS camera. It was a composite of two images, one of the prominence and the other of the sun’s surface. The camera was monochrome so color was added. This telescope is a solar and lunar imaging machine! WARNING: Do not use to view the sun without proper filtering as permanent damage can occur to your eyes or equipment!

I have the 102 mm ED verson from Svbony. I have used it for visual observations and photography, it's very very nice for the planets and the Moon (with filter) clearly better than my Bresser 102/1000 mm achromat. It also has an excellent focuser.

I've been using this scope for almost 2 years. Primarily DSO astrophotography with some visual use. I have zero complaints.

I own the Svbony 102/714 mm for 6 months now, previosely I had a Bresser 102/1000 mm F10 achromat and the Svbony 102 ED has a much better optical quality and performance. Also the 2 speed focuser is infinitely better than the ones used on simple achromats.

I bought this exact OTA a month ago and I tried planetary photography and the results surprised me a lot.

I bought the SV503 80 and I'm very happy with it's performance and build quality.

I have the svbony 503 80ED and the sv550 122mm, I started astrophotography seriously at the end of last year.I'm a real fan of the Svbony brand.

The SV503 telescopes are awesome for this price-range. And especially the 102mm is the best choice for both visually observing and astrophotography.

I own this 102ED myself, and I am planning to add a mono camera and filters ouch instead of getting a triplet/APO

I purchased the 503 80ED last year after having entered into AP and had no idea what a doublet was. I found that the quality was great considering it was my first refractor.

I bought the 102 version last month. I'm under Bortle 8 skies, so even my C6 has contrast issues . Yet, the Svbony, under full magnification 200x (using your favorite Baader Zoom and barlow set) at Jupiter and Saturn worked very well.

I am in love with this refractor. This is a well-made piece of equipment from an underrated company that will make noise in the astrophotography world. The only important piece of extra equipment needed is a field flattener to counteract the field distortion (due to it being a relatively small aperture telescope), which does come at a bit of a steep price. However, the flattener is specifically made for the sv503 70ED. The fine-tuning knob is a must for any deep sky photography, and is very smooth on the 70ED. Personally, I'd like to see a little more resistance to moving to counteract any accidental bumps after fine-tuning the focus. The 503 also comes with pre-drilled mounting points where you can attach two accessories. Currently, I have a guide scope and laser pointer attached to mine and it stays rock solid. The only trouble I've had with my scope is the relatively short dovetail plate it comes stock with. In order to balance everything well, I had to turn the plate around to extend a balancing point and barely made it work. All in all, I would have to have purchased the 80 or even 102 refractor, but my current mount won't accept more weight than the 70ED. Don't be skeptical of the price! When I first came across it, it seemed very strange that and ED refractor would be so affordable, but decided to take the chance. And I'm glad I did! I am definitely an svbony fan now and have had nothing but wonderful interactions with their sales team. Thank you!

Nicely crafted telescope. No chromatic aberration. Very nice colours too. But (so only 4 stars) strong curvature of field already with APS-C Sensor. So flattener is a must for astrofotography. Improvments recommended: longer dovetail for balancing with astrocam.