Instruct: Classify Amazon reviews into positive or negative sentiment
Query: First Hubble Mirror

The lens is like the very first Hubble photos out of focus. I had to shoot every thing with manual settings on A Nikon D40X (all exposures were trial and error). As with the first mirror for the Hubble Telescope - I think that the mirror is a fraction off, making it out of focus no matter how accurate your camera is. I have taken far superior photos with a fixed lens Digital Zoom Camera. I've been in photography for over thirty years and can truthfully say this is the worst lens ever purchased.