Microscopic resolution by simple means

The intermediate ring is absolutely stable and solid and lined with lichtschluckendem material. The quality is definitely top. At best, the price is a bit high. Here is to consider whether it does not also the product of another manufacturer.

The exciting question is, of course, as the pictures look. That is less dependent on ring, but more the lens used. Basically, the ring fits all Canon lenses, the achievable properties are given in the technical data, the respective lens. However, it does not at all objective sense. In general, at short focal lengths is the problem that the lens on the object is pending before the picture is sharp at all. At long focal lengths, the effect is minimal and the minimum focus distance is reduced only slightly. Who wants to try before you buy time, how does his lens, easy to hold the lens with 27 mm forward of the camera and look through the viewfinder. Works the same, just a little shaky.

With the standard lens EF-S 18-55mm significant results are definitely achievable. It is an enlargement of up to 1: 1 attainable. The professional Macro lenses can no longer also. Real 8 microns resolution are thus on the EOS 550D in reality achieved (4 microns per pixel). At maximum magnification, however, occurs much curvature of field, ie, at a flat object, the center and the edge of the image will not be clear at the same time. Also stopping down does not help much. As long as one does not photograph objects that actually a flatbed scanner would be better suited to digitization, but this is not relevant, because otherwise any case not the whole picture gets the same sharp at this magnification. For a somewhat larger distance the depth of field is higher and this effect is not visible.

With or without intermediate ring can be almost seamlessly focused to a small gap in which a magnification jump of 20% occurs with the said objective the entire distance range. The zoom setting should always be at 55 mm case. The additional acquisition of smaller intermediate ring is thus not unbedigt sense.