For a digital Camera to be of great value to a photographer it must a have Camera Lenses with the following attributes.
Focal Length: This defines the Camera’s Lens’s angle of observation. There are various types of Lenses available in the market namely fixed focal span lenses which are not zoom-able and sometime referred to as primes, having a single number and the zoom lenses with two numbers indicating the extremes of the range.
The other component of a Digital Camera is the Aperture which describe amount of light gathers by the lens, normally expressed in many different ways including f4, f/4, 1:4 which offer the similar meaning.
A digital Camera with a smaller number indicates that the lens has a larger maximum aperture which enables it to gather more light. Having a lens with a larger aperture will allow a photographer to capture images in a lower light environment. With a Digital Camera having these lenses you are capable of taking photos indoor with no flash. As you go for a Camera Lens with larger apertures you need to note that their bigger sizes reduce the depth of the field.
The other important feature of a Camera lens is the Image Stabilization(IS) which different manufacturers having different implementation method. Below are some references uses by various manufactures when describing Image Stabilization:-
IS known as Image Stabilization is used by the Canon Company, OIS which refers to Optical Image Stabilization is used by three giant Companies namely Panasonic, Samsung and Fujifilm, VR known as Vibration Reduction is deployed by Nikon, OS which stand for Optical Stabilization and not Operating System is associated by Sigma Company.
The Optical Steady Shot (OSS) is used by the Sony Company while Tamron uses Vibration Control (VC) to describe the Image Stabilization. The other two features to be considered when choosing a Camera Lenses are the Format and the Lens mount. The Format is the sensor size designed for a lens to use while the mount is used to determine whether your lens will physically fit your digital Camera.
Questions to ask yourself before buying Digital Camera and Camera Lenses
Does the Digital Camera automatically select the most appropriate shooting settings for optimal output based on the environment? Does it have the ability to automatically and smartly select aperture speed based on the shooting surroundings, how much does it bring the subject into focus, how does the Camera react in a low and high light situation. Does the Camera have the capability to allow you select a colour and replace with the best colour for your circumstances?