SK

Sep 02, 2021

Svbony 0.5x Focal Reducer 1.25" for Telescope Photography Observing

Metal Metal construction , no plastic

Devon Scott

May 30, 2021

Svbony 0.5x Focal Reducer 1.25" for Telescope Photography Observing

Works nice. Threads onto my SVBony camera great.

PGF

Mar 30, 2024

Svbony 0.5x Focal Reducer 1.25" for Telescope Photography Observing

Powerful focal reducer in a small form factor - make sure that's what you need A powerful focal reducer in a small factor. I purchased it to help my guiding scope focus on large objects that took too much of my field of view and did not care about aberrations that might accompany this type of optics. Good value for the money.

juan alvarez

Jun 05, 2021

Svbony 0.5x Focal Reducer 1.25" for Telescope Photography Observing

Recomendable Funciona en telescopios de gran focal

Chloé Bertrand

Jul 22, 2024

Svbony 0.5x Focal Reducer 1.25" for Telescope Photography Observing

Excelente producto! Excelente producto, calidad superior, bonito diseño y color, llegó super rápido, gracias!!!!!

Juan C.

Aug 07, 2021

Svbony 0.5x Focal Reducer 1.25" for Telescope Photography Observing

Bueno Buen precio, y la relación calidad precio esta bien funciona con mi cámara ocultar

kd8txw

Aug 13, 2020

Svbony 0.5x Focal Reducer 1.25" for Telescope Photography Observing

Still have to figure out focus distance- using with zwo120 and orion 60mm guide scope I'm trying to find the focus point while using it with an Orion 60mm guidescope and a ZWO 120 camera & 1.25 adapter. I ordered an Orion 1.25" extension tube. Maybe that will help but I'm not sure. For $11 the lens looks OK to me. Hopefully I'll be able to use it. If not I will try it with my eye pieces.

M.Scott

Oct 30, 2025

Svbony 0.5x Focal Reducer 1.25" for Telescope Photography Observing

Good for the price Good quality optic for the price, works as described and fits perfectly.

Tom H Texas

Nov 29, 2024

Svbony 0.5x Focal Reducer 1.25" for Telescope Photography Observing

A great way to expand your field of view! This focal reducer screws into the nose of an astrophotography camera or 1.25" eyepiece. For visual use, it turns a 20mm eyepiece into a 40mm, both decreasing the magnification and increasing the field of view. In astrophotography, the focal reducers does that, but it also reduces the size of stars on the sensor by half, meaning you can image faster with a wider field of view. For example, an f/10 camera/scope is reduced to f/5 will image roughly six times faster (if my math is correct) because the focal reducer concentrates more photons on each well in the sensor. This focal reducer works well and gives a nice view. I highly recommend it!

Ken Bessler

May 19, 2021

Svbony 0.5x Focal Reducer 1.25" for Telescope Photography Observing

Works but needs basic instructions for newbies.Works but needs basic instructions for newbies. I had to call a few places to get this info: Take the stock lens off the camera. Don't use it with this thing on. Focusing can be touchy. On my Astro Fi 130 with a Pegasus focuser I found that I was overshooting the focus point and seeing nothing because the camera takes a few seconds to get a lock in Sharpcap plus the focuser has 20,650 steps. The range of steps between fuzzing out/seeing anything/fuzzing out again was 150 steps. Until I went from 0 to 20,650 at 100 step intervals waiting 5 seconds for Sharpcap each time, I couldn't even tell if it would ever work. Finally I got a fair shot of Vega..... I don't know if it's any good for a 5 inch reflector but...eh.

Justin Case

Mar 06, 2024

Svbony 0.5x Focal Reducer 1.25" for Telescope Photography Observing

Great when Back Focus Requirement is taken into account I will post photos shortly. Mine works fine, visually. But we all know the wandering eye can be very forgiving when it comes to differences in focus between the center and the edge of view. So, what gives? According to Manish Panjwani and Brian Ventrudo at agenaastro, based on the book by Harrie Rutten and Martin Van Venrooij, the "ideal" or "designed" back focus "BF" of a reducer can be calculated as: BF = F_R *(1 -M) where F_R is the focal length of the reducer, and M is it's strength (x0.5, here). Most manufactures of these x0.5 1.25" reducers claim a focal length F_R = 85mm. This gives a back focus "BF" of 42.5mm. Add 1/2 the length of the optical tube of the reducer (to get to the center of it; e.g., 1/2 of 20mm = 10mm), and you arrive at 52.5mm - which is very close to the usually advertised BF of about 50mm. For example, my ZWO ASI585MC has a distance of 36.5mm between the sensor and the end of the 1.25" adapter. So, for that, I need about an 15mm spacer. Sure, for simple refractors, reducers can be used outside their designated range - but that will affect the reduction factor, FoV, and quality at the edge of view.

James

Jun 09, 2026

Svbony 0.5x Focal Reducer 1.25" for Telescope Photography Observing

A very handy filter to have It is easily fitted to the end of a camera to give a wider view.

tellezrojo

Jan 22, 2022

Svbony 0.5x Focal Reducer 1.25" for Telescope Photography Observing

Vale la pena Este aditamento es útil para tener una visión más amplia, el vidrio me parece de calidad. Se.adapta a oculares, filtros e incluso lo he podido colocar al final del adaptador para la cámara fotográfica. Quizá es mi falta de pericia, pero su limpieza se me dificulta y es frecuente que ponga los dedos en el vidrio. No me pasa con otros aditamentos. Vale la pena.

JG

Feb 07, 2025

Svbony 0.5x Focal Reducer 1.25" for Telescope Photography Observing

Excelente producto Excelente reductor para roscar en el ocular.

CI

Aug 26, 2023

Svbony 0.5x Focal Reducer 1.25" for Telescope Photography Observing

Functionality and quality at a great price. Perfect with the sv 305 camera and the sv 105 mk. It is helpful that the maksutov is a telescope of high corrected optical. Also works great with high magnification lenses like 5mm on the same sv 105 mk. The images from the camera were compared on the page (astronomy.tools/calculator) and give similar proportions using the ZWO mini 290 as a reference. Same sensor size. For price you can not expect more. For me it is perfect.

Tammam

Aug 02, 2026

WiFi Astronomy Camera | SVBONY SC311 Pro

Product Review

https://www.youtube.com/watch?v=glWPJo3kyoY

Mike O'Neill

Aug 03, 2026

APO Astro Camera Lense | SVBONY SV535

Product Review

Bonnie & Clyde had a baby… Tammy, the little Sv353 APO. Paired with a ToupTek AE676C for a little over 4 degrees of sky coverage. Enough to nicely frame NGC7000 & NGC5050, pictured below. 10x120s SV535 SV220 7nm filter AE676C - 200 gain, 1155 offset This little scope performed magic in just 20 minutes. I’m looking forward to getting a few hours done with it.

Pedro Jorge Álvares de Faria

Aug 04, 2026

ED Roof Prism Binoculars SV202 Upgraded | Svbony

Product Review

I received it today, and everything was exactly as described. It’s very well-made; I’ve already done a quick test, and it exceeded my expectations. I’ll run some more tests later. Delivery to northern Italy took 15 days. Congratulations. Keep making high-quality, affordable products. Thank you!

Tammam

Aug 06, 2026

WiFi Astronomy Camera | SVBONY SC311 Pro

Product Review

Despite its modest capabilities, the SVBONY SC311 Pro successfully captured a video of Saturn through my Celestron NexStar 8SE telescope. This video shows Saturn and its iconic ring system as they appeared during the observing session, demonstrating that the SC311 Pro can produce impressive planetary results with proper processing.

Lucian Popescu

Aug 11, 2026

Svbony SV202 10x50ED Binoculars Extra-Low Dispersion Bak4

Product Review

For the short test I have done , the quality looks fine with clear image and easy to focus. The built quality looks fine -- I would redesign maybe the tripod adapter by using a longer thread for a better pair with the adapter for a good fixing