These lenses are very suitable for beginners. And especially for those who just want to test the effect of such lenses because the really cost little. I myself use most frequently the +4 lens of the set. This offers quite a large magnification and even good quality. The +10 is very interesting, but it must be said that the chromatic aberration to become quickly very noticeable. That's why this lens is only partially available. For such increases you should buy an achromatic lens, however, which costs considerably more than this set. It is also possible to screw all of the lenses to each other, then this corresponds to 17 diopters. Really useful, this combination is not. Here, the quality and extremely according to depth of field is extremely low. In addition, I must say that with my Nikon D3100 and the 18-55 VR lens autofocus still works surprisingly well. But at the latest at +10 should perform it manually, as it in the shallow depth of field is difficult to impossible to focus on the Irish point automatically you want to have, is the hand of a lot better here. Even at +4 can be manually achieve better effects.
