SVBONY SV119 Extension Tube Kit for Cameras and eyepieces 5mm 10mm 15mm 30mm M48x0.75 on Both Sides for Solving Spacing Problems in Astrophotography

These seem to be better quality than some others I have ordered and are less sensitive to the threads locking up when tightened. Happy with the purchase.

It purchase two manufacturers extension kits and the SVBONY SV119 took care of my needs. The fit and finish was excellent.

Svbony wasn’t the only brand available to buy, but my decision to go with their rings was based on previous experience with them. And I was not disappointed! It fitted perfectly with my flattener and camera, which are from different brand. Beautiful construction with anti-reflection internal surfaces! I totally recommend Svbony rings, no doubt!

Well they did it again . Great set of spacers at a great price . Threads are clean paint is nice . Good selection of different sizes and let’s face it ……. We all need them so save some money and buy a great set for less than the overpriced guys

This set has the random lengths necessary to align a camera to the correct back focus distance on your telescope field flattener. This back focus distance is critical in astrophotography. The threads are well machined and overall appearance is great.

After they arrived bonded together, I could only break them unstuck with help of the support team. Now, the 5mm threads bonded to my camera adapter, and is completely inseparable. The worst part is that I only screwed loosely, knowing this could happen.Best to treat any attachment made with these as permanent. Lucky I could save my OTA from being stuck to these.

I received the Extension Tube Kit the very next day of ordering. Unfortunately, I ordered the wrong size M48x0.75. I have since reordered the correct size M42x0.75, and have received it. I am very pleased with the extensions. I returned the incorrect item.

I have bought several tubes, several extensions and focal reductors from svbony, and they really deliver good products and great prices. The only thing is that sometimes the roundness of the tubes is not perfect, that you will notice when trying to couple or insert them with the focuser or the 1.25" openings. It seems they are a tiny fraction of the roundness of their pieces off.

Excelente producto

Excellent produit

Good for the price not as thick as more expensive one's but better than no name and thread together smoothly. Delivery was by BNI and once again package was open. That's 50% of the time over many many deliveries now that there has been a problem, either not delivered (so called lost /stolen) or open and left on step in the rain or snow or late 3 weeks for one. There is a big lock box provided right at the door and signs telling them where to put it. We have no problems with other delivery companies doing it just them, Worst company in my 20 years of ordering.

Extensor de 2", ideal para cuando se necesita un back-focus más alejado del que da el ocular por si mismo.

funciona perfecto