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SVBONY SV503 Astronomical Telescope 102mm F7 ED Extra Low Dispersion Refractor OTA for Astrophotography

SKU: F9359D
US$ 599.99

1.Rugged housing prevents damage;

2.Sliding graceful and soft dual-speed focuser;

3.Ed glass (FPL51) can produce very beautiful and clear images;

4.The fully multilayer coated lens eliminates all reflections on the glass, and it has little or no chromatic aberration at high magnification.

Looking for more info on attaching the 0.8x reducer/flattener to the SV503 102mm ED? You can refer to this link:


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                     SVBONY SV503 Astronomical Telescope 102mm F7 ED Refractor OTA

                                            ED Extra Low Dispersion Glass

S-FPL51 glass

                                           Dual-speed Rack & Pinion Focuser

1:10 Focuser

                                                      90mm Back Focus

90mm Back Focus

                                              1.17 Arc-second Resolution

SV503 102ED Resolution

                                                Compatible With 1.25"/2" Adapters

1.25/2 inch interface

                                                  Metal Hoop With Dovetail

Metal Hoop with Dovetail

5 reviews

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An excellent semi-apo refractor

This refractor has a fantastic price performance and quality ratio. The image quality is significantly better than that of a 102/1000 mm F10 achromat, which I used before purchasing the Svbony 102/714 mm ED. It's focuser is also excellent, very smooth and pleasent to use. I highly recomand this telescope.

Great combination for astro and nature

Have had my SV503 102mm for a few weeks now and is very pleased. Changed out my 10" dob for the SV503 to get more usage and flexibilty. And what a pleasant surprice it has been. Bought it with a SA409-SA410 tripod and a SV222 prism and a few baader hyperion i already owned to get a big spotting scope and a vercitile optical astro telescope. It matches my fathers more expencive spotting scope in the nature and excel it on astro objects. I can easily see the individual rings of saturn and the bands and spot on jupiter. Havent had the chance to watch andromeda or the orion nebula yet. I will have many nice sessions with it for years to come. Very pleased with my purchase and would higly recomend the SV503


I bought a SV503 102mm ED as my first ever scope in early 2022. It has proven to be a sturdy and well manufactured piece of equipment that is a pleasure to use for astrophotography. There is no evidence of any fringing or aberration in my images. The focuser is very smooth to use and remarkably stable over a deep-sky photography session. The auto focuser was easily installed as per SVBony's recommended method and handles the task without difficulty. Teamed up with the SV106 guide scope and Phd2 software, the combination produces clear and well contrasted images. There is some field curvature out near the edges of the images but I am confident that the flattener that I have on order will fix that. I have to say that I actually much prefer using the SV503 rather than my more recently purchased 8" SCT. All in all, a great buy..!!

Excellent optics and picture quality

I purchased the SV503 102ed scope and the sv193, 0.8 reducer and just last night had the chance to put it to use. I added the sv503 70mm scope as it's guide scope. Added the ASI1600mm pro camera and after the Horsehead Nebula was in striking distance, I managed to get a few HA shots and then stacked them. Only using 5 images at 5 minute subs, I was blown away at the quality of the picture. Of course, using Narrow band filters there was no CA at all, even still, I was thoroughly impressed and pleased with the quality of the pictures. SVBONY did an excellent job with this scope. There is no place to add a picture here otherwise I would have shared that with you.

A telescope that deserves a good reputation

Hey guys, I recently got a new refractor. The Svbony SV503 ED 102/714. My first refractor with ED glass. In terms of quality, the whole telescope comes across at a high level. It is built solidly and just feels valuable.The dual-speed-RAP-focuser is my highlight! My God! It glides so nice and soft ... now focusing is always a pleasure. Nothing grinds when focusing and there is also no silicone grease that sticks to the fingers. A rotating focuser and ring clips add value to the telescope. But even such simple parts as the screws are milled very filigree and can be moved very smoothly. The lens cap is made of metal and sits well on the dew cap, which can also be moved. That reduces the dimensions during transport. Without tube rings, the tube weighs 3353 g. The ED glass makes a very nice, clear image. Chromatic aberrations only come to light at high magnification and in certain light situations. Finally I can make observations during the day (with low power eyepieces) without disturbing chromatic aberrations. Just yesterday I was watching the moon and I didn't notice any chromatic aberrations! Not even with my Baader Classic Ortho 6mm! Maybe it was because of the position of the moon... I don’t know… All I can say: Svbonys ED-Glas is in no comparison to an achromatic lens! And the negative? It's just a shame that the Svbony doesn't have a 120mm opening. I would buy again!


Product Name SVBONY SV503 102F7 ED Astronomy Telescope
Type Refractor
ED Glass S-FPL51
Coating SMC
Aperture 102mm / 4.01-Inch
Focal length 714mm
Focal Ratio f/7
Type of Focuser RAP (Rack and Pinion)
Gear Reduction 1:10 Fine movement
Resolving capacity 1.17"
Limit value 12.1
Light gathering capacity 212x
Max. Useful magnification 204x
Tube weight(with rings) 5.5kg
Tube outer diameter 121mm
Tube material Aluminum
Back Focus Length 101.9mm
OTA Length 630mm
Dovetail & Ring Yes
Dovetail Length 200mm


  1. 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

The Real Shot Image by SV503 102mm OTA

picture capture by sv503 102ed.jpg

captured by sv503 102ed telescope.jpg

The Bundle Set of SV503 102mm by Our Clients

sv503 102.jpg

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