I just bought a Pentax K1000 camera for my friend's birthday. I have a very limited understanding of photography, but the camera I bought has a 35 mm lens (picture attached). This means it doesn't zoom, right? If that's true, is the lens removable? Could I buy a zoom lens for it? How would I search for one that would work on this camera? Sorry if this is confusing or poorly phrased, I have no idea how any of this works but I'd like to get as good of a gift as I can. Thanks!