Super Plössl 15
The last one is useful for planetary observation. The xx magnification can resolve some great details in planetary such as Jupiter or Saturn. Unlike the 56mm, the 15mm focal length is really adequate to capture details on Mars for instance. You can easily imagine that such a eyepiece is not recommended for deep sky observation due to its power. Indeed, the magnification needs light and contrast to see correctly an object and it's not the case of DSO. This focal length of eyepiece suffers from a huge handicap. In fact it's extremely sensitive to the atmospheric flow so called turbulence. Due to this problem it becomes difficult to regularly use this eyepiece