Hi All, Not sure where to post this, I thought that adapted lenses seemed appropriate. Here are my first impressions of the Fotga macro extension tubes I've just take receipt of. Below is an image of the 10mm and 16mm tubes stacked together; I've tried them with my 12-40mm and 17mm lenses and found that the 16mm tube works with the 12-40 and the 10mm tube works with the 17. The quality of the tubes is "OK" not stunning, but for £22.66 from Amazon it's not bad. The camera side mount is metal, the body is very plastic and the lens side mount is plastic. Overall they feel sturdy enough. The quality of the electrical contacts seems to be OK and I can confirm that AF works with the extension tube between the camera and the lens. 12-40 Lens - 16mm Tube Although the 12-40 lens does work with the 16mm tube, in reality there isn't much point to it. The 12-40 allows you to get quite close to the subject without the tubes and to get focus with the tube, the subject is practically touching the front of the lens. It's probably no more than 5-10mm away (you can see the shadow of the lens). This makes it very difficult to use and risks scratching the glass. I'd pass on this. 17mm Lens - 10mm Tube This is a much better result. The 17mm lens isn't very good at close-up in native mode; but the 10mm tube makes a world of difference, you can get much closer. The picture below was taken at a distance of about 10-15cm so it's a lot more manageable than the 12-40 and I'm quite pleased with the result from this. Below are examples of closest focus for both native and adapted for comparison, the subject is an old sixpence (measures 19mm diameter) that I dug out the garden one summer. DoF is like a razer at f1.8 so I shot all the photos at f5 to make focusing a bit easier. ISO is between 2000 and 3200 due to poor lighting. 12-40 lens in native configuration f5 12-40 lens with 16mm tube f5 17mm lens in native configuration f5 17mm lens with 10mm tube f5 Let me know what you think!