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🔭 Elevate your stargazing game—focus sharper, shoot steadier, and never miss a cosmic moment!
The SVBONY SV157 Extension Tube is a 70mm total length, 1.25-inch diameter all-metal telescope accessory designed to extend your camera or eyepiece for precise focusing. Featuring standard threaded ends for filter compatibility, a brass compression ring for secure mounting, and an anti-reflective full-thread interior, it enhances astrophotography setups by ensuring stable, high-quality imaging with long-lasting durability.
| ASIN | B083TQHTLG |
| Best Sellers Rank | #36 in Telescope Photo Adapters |
| Brand | SVBONY |
| Compatible Devices | Telescope, Camera, Filter |
| Customer Reviews | 4.6 out of 5 stars 126 Reviews |
| Eye Piece Lens Description | Plossl |
| Finderscope | Reflex |
| Focal Length Description | 40 millimeters |
| Focus Type | Manual Focus |
| Item Dimensions D x W x H | 4"D x 2"W x 2"H |
| Item Weight | 47 Grams |
| Manufacturer | SVBONY |
| Manufacturer Part Number | FW9118B |
| Model Number | FUSW9118B |
| Mount | 1.25 inches mount |
| Objective Lens Diameter | 70 Millimeters |
| Optical Tube Length | 70 Millimeters |
| Optical-Tube Length | 70 Millimeters |
| Product Dimensions | 4"D x 2"W x 2"H |
| Telescope Mount Description | 1.25 inches mount |
| Warranty Description | We provide 1 year warranty for SVBONY telescope accessories and 30 days no reason to return. Beyond the warranty period: We still offer maintain service, buyers are required to afford corresponding costs. We processed in the most hassle-free way possible.You just need to contact with us on Amazon ,we will reply you within 12 hours |
L**C
Affordable but well made and works erfectly
I needed an extension tube so my QHY 5-II-M camera wouldn't fall out the back of my Orion 50mm mini guide scope. Even with the nose extension, I only had 1/4" of the camera in the scope in order to achieve focus. I have several SVBONY products and while they are definitely "entry level" in price, they have all performed exactly as promised and as needed. The extension tube is no exception. The fit is perfect, the finish looks fine and the threaded bolt to tighten the brass band that hold the guide camera in pace tuns smoothly and holds the camera without any play. I'm very happy with this fordable solution to my guide camera back focus dilemma. I highly recommend this product if you need an 1.25" extension tube.
A**O
Great product
This extension tube has standard 1.25" diameter threads to attach filters or other components. I use this with a 0.5x focal reducer attached to the end, plus a light pollution filter. The threads seem high quality. This is a nice long tube that allows me to attain proper back focus for the reducer. I attached an image of how it fits into my setup -- the camera goes into the extension tube at the correct depth, and the extension tube + reducer + filter goes into the eyepiece holder, connected to the visual back. (I plan to test this without the diagonal as well, which should work theoretically). The collar of the extension tube holding the camera in place is secure and I didn't have any issues with it moving during my captures. I'm able to achieve perfect focus (using Bahtinov mask) from 0.5x to 0.33x reduction with no noticeable star aberrations. (Telescope is Celestron 8", camera is QHY5iii715C, and the focal reducer is from Apertura.)
S**N
Plain and simple, it works.
Looking to get that extra bit of back focus for not a lot of money? Here ya go.
C**N
Good Product
Good product and worth the purchase
P**O
Great for guide scope extensions
This is sturdy and well built whether you use it as a guide scope or eye piece extender it will perform well.
R**S
great clarity
everything from svbony so far has been TOP QUALITY ! VERY SATISFIED !
V**N
Just what i needed for my rig.
Works very well for my setup.
J**S
Works great!
I needed some extra focus stand-off, and this provided it perfectly. Brass compression ring is a nice touch. Metal construction is solid and well fitting. Straight pass-through, so no worries about optical component quality.
Trustpilot
3 weeks ago
2 months ago