"Your camera is only as good as your lens?" - Discuss. Well, we have always known that if you put a beer bottle bottom on the front of a camera body, you are going to get terrible results, but how much do you need to pay for a lens? The F stop is one of the most important features of a lens, as this indicates how much light is going to hit your sensor. If the f stop is 1.2, then we are all very happy, if it’s 5.6, then that’s not so good; however, on a zoom lens it’s going to be impossible to get an f1.2, as the zoom aspect of the lens, reduces the light input. The very basic rule is, the more you zoom the less light gets to the sensor, but lots of lens and camera manufacturers have done the best they can to keep sharpness in imaging and have developed f2.8 zoom lenses, thereby hanging on to that precious light. Image stabilisation is a good bonus, as it helps to reduce camera shake and the auto focus motors can be positioned in the camera or the lens, so just keep a look out for that. Digital Single Lens Reflex lenses are easy to fit and most bayonnet clockwise and lock into place, apart from Nikon, which bayonet anti-clockwise.