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Use this extender tube adapter for obtaining the correct image scale or for the exact spacing required for a reducer or field flattener; Get to the right focal plane for focusing with a camera or eyepiece
4 Pcs Extension Tube Kit
The required spacing can be achieved by combining several extension tubes of differing lengths, you can combine them to get whatever extension you need when using a corrector or barlow.
Eliminates a range of focusing problems. You can extension tube use this with any camera or eyepiece or with various adapters. The M48*0.75 threads on both ends make it extremely versatile.
The extension tube adapter is fully metal construction and anodizing aluminium process is durable for long time use; 72.9g / 2.57oz net weight is light and will not be extra burden for your devices.
WhatDadThinks
2025-08-25 17:20:28
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
208JeD
2025-08-07 15:09:33
As with all SVBony products I’ve purchased, great quality, especially for the price!
ScottA
2025-07-13 15:00:55
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.
Ted Nawn
2025-07-12 13:38:32
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.
M. Brown
2025-07-06 14:47:39
It seems like a nice set of extensions, but the insides need to be flat black, not shiny or reflective.
Jesus Ponce De Leon
2025-06-16 11:16:14
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.
Gary T.
2025-06-08 14:36:25
Solid workmanship. Threads and tubing are great. The only area of improvement would be to label the spacer's size on each ring.
Grumpy in California
2025-04-23 19:14:00
These seem to be fairly well made and they certainly work but the male and female threads are shorter than all of my other M48 extension tubes and accessories which means that the female ends don't mate fully with these other M48 parts. So, they actually end up providing a bit more spacing than the indicated 10mm, 15mm, and 30mm lengths would suggest. I guess the difference is somewhere around 1mm so if you used only the 10mm tube you might end up with 11mm of actual extension. Of course, the thread lengths match to the other tubes in this set, so the 10mm + 15mm tubes produce 25mm PLUS any amount that isn't taken up by the female end of the tube (when that is mated to the longer male threads of a different brand of M48 part).The flip side of this issue is that if you wanted a nonstandard length (like the aforementioned 11mm) then this set could provide a different increment of extension.The threads seem long enough to provide a strong connection but I would have preferred an extra 2 or 3 threads on the female end (or about 2mm of extra depth). However, that wouldn't have been possible on the 5mm extension and perhaps that's why they used the short depth on all of the tubes.Seems like they just didn't machine the threads deep enough (either an oversight or an attempt to reduce the cost on the construction or because they wanted the 5mm to mate flush with their other tubes).
stereofreak
2025-03-15 13:38:12
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.
JG
2025-01-25 14:12:28
Extensor de 2", ideal para cuando se necesita un back-focus más alejado del que da el ocular por si mismo.
Gerardo
2024-12-06 18:27:19
funciona perfecto
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