SVBONY

Reviews 3,881 ~

4.8

Review summary

SVBONY is a brand dedicated to providing high-quality, affordable optical instruments for astronomy and outdoor enthusiasts. Its diverse product range includes telescopes, binoculars, spotting scopes, microscopes, and a wide array of accessories like eyepieces and filters. Committed to innovation and customer satisfaction, SVBONY serves everyone from beginners to advanced users worldwide.

4.8

Excellent

3.9k reviews

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All Reviews

bbdd

Jan 08, 2024

SVBONY SV188P 99% Reflectivity 90-Degree Dielectric Mirror Diagonal

SV188P

Another fine product from SVBONY I had a diagonal with my Meade 6 inch refractor along with a complete set of Meade series 4000 Plossl eyepieces. After reading about various degree of light transmission through diagonals, I decided to test the one I had. I looked through it at my computer desk which has wood veneer on it. The desk is brown color but through the existing diagonal it came out as mostly grey. Having purchased a diagonal finder from SVBONY and been happy with the product. I decided to pick this up which is about 1/3 of the cost of a similar diagonal from more well known companies. I took it out of the box and tested it against the desk and it is the same brown that the eye sees. Ironically a friend (who I bought the telescope from) found a 2 inch diagonal in a discount store for $5. He gave it to me. It was in its original box and looked brand new. It had no brand name or any other writing on it. I did the test on the desk and it and the SVBONY one both produce the same sharp, brown image. P.S. It was black inside and not red.

JimmyA

Feb 24, 2023

SVBONY SV188P 99% Reflectivity 90-Degree Dielectric Mirror Diagonal

SV188P

good value, shorter path length than premium $100 diagonals Bought this as I have a small f/5 modified scope with limited infocus travel. My premium diagonals have a longer optical path length and don't work in this scope. This SVBONY diagonal has a shorter path and will allow my eyepieces to focus. This is pretty decently made, although my use is not optically demanding (low power only) the difference in reflectivity when compared to a non-dielectric diagonal can be seen. This diagonal is marked "99% dielectric coated" which refers to the mirror reflectivity. The side plates on this diagonal are blackened on the inside. SVBONY may have corrected the design or the ones mentioned that are red on the inside slipped past quality control, which is spotty with China manufacturing. Hopefully the coating on this is more durable than a conventionally aluminized mirror, since at this price point it's not worth reconditioning. The mirror appears to be glued in place, so if the collimation is off it's not really fixable. Check it with a laser collimator in the eyepiece port and place a flat mirror on the telescope side, facing the mirror and collimator. The laser spot should reflect dead center on the collimator target. This particular diagonal checked out fine, but since the mirror is likely installed by hand it should be checked when you get yours. IMPORTANT: there are similar SVBONY diagonals with silver side plates that are described as Dielectric. If they are, the specified reflectivity is VERY LOW for a dielectric mirror. Most likely it's incorrect information, and that's why they are about $10 cheaper. Getting a straight answer out of China makers is hard because of the language barrier. I think those have the same metal parts with a conventional non-dielectric mirror.

rupy

Dec 26, 2025

SVBONY SV188P 99% Reflectivity 90-Degree Dielectric Mirror Diagonal

SV188P

Great value for money This product gives full value for the money.It is a part of the telescope which can really make a difference,especially if the one being replaced is stock ,which came with the telescope.

Dan Sullivan

Dec 21, 2023

SVBONY SV188P 99% Reflectivity 90-Degree Dielectric Mirror Diagonal

SV188P

Much better than stock diagonals, brighter and clearer views I didn't expect a 55$ diagonal to blow me away, but here we are. I recently purchased a Skywatcher 102mm StarTravel, the included 45 degree diagonal is perfectly usable for terrestrial, but for sky observing with objects high, it's much more of a problem. I was recommended this diagonal from a friend, and I was blown away with the difference in brightness and clarity of viewing. I have purchased a few SVbony products and they never fail to impress. This diagonal is no different. The mirror is huge compared to cheaper diagonals, and the dialectic coatings make it much brighter. If you need a diagonal buy this one with confidence. It comes with a brass band and not just a screw, so your eyepieces shouldn't get scratched up. Getting used to left and right being backwards, takes some getting used to, but it's definitely not a deal breaker. An unexpected side benefit, is the mirror is very easy to clean. (with a microfiber cloth) That was a problem with the default one that came with the scope.

11968167822

Apr 03, 2026

SVBONY SV188P 99% Reflectivity 90-Degree Dielectric Mirror Diagonal

SV188P

Confio comprar na Svbony, eles nunca me deram canseira, são pontualConfio comprar na Svbony, eles nunca me deram canseira, são pontual Produto original, a qualidade do material é excelente, amei

Andy

Oct 21, 2024