Choice Of Lens

The features of a digital SLR or digital single lens reflex camera can be compared with the latest auto focus single lens reflex film camera of 35mm. Both operate on similar mechanical principles in terms of optics. The main difference being that the film is replaced with a CMOS sensor image, which results in the creation of digital images. This is done with the help of the accompanying electronics and eliminates the need to develop films through chemical processes.

Digital camera lenses come in a large variety. There are various words and terms used for them. For example the focal length of lenses are said to be equivalent to 35mm. Fixed focal length lenses cannot be changed like other lenses. The photographer is required to go closer to his subject if he desires to take a close up. However clicking from extremely close quarters can cause the features of the picture to get distorted. These types of lenses are not changeable.

Digital cameras have typical zoom lenses. To be more precise, a digital zoom cannot be called a true zoom like an optical zoom. In an optical zoom lens the focal length changes and the mechanism of the zoom extends itself to retract in order to magnify the lens. Optical zoom is known to produce the best images in terms of quality. A digital zoom is actually a simulated zoom. It causes the central portion of the image in a camera to enlarge. That is, there is no actual alteration in the length of the lens. Digital zooms are notorious for reducing the quality of the visuals.

Wide ranges of interchangeable lenses are used in Digital Single Lens Reflex Cameras (DSLR). DSLR lenses can be compatible with the lenses, which are used with 35mm film SLR. Many digital cameras make use of add-on converter lenses.

The popularity of the DSLR cameras is mainly due to their capacity to exchange lenses and, make the best choice of attachments in terms of specialized lenses. Range finder cameras in both the categories – digital and film, share the same feature. The typical among them is Epson R-D1 and Leica M8. Converters that can be attached to the ends of fixed lenses are used with compact cameras. This is optional and copies the usability quotient of multiple lenses.

In DSLRs, the diameter of the lenses is usually larger than in point and shoots. This translates in the phenomenon of the subject catching more light. The option of faster shutter speeds has to given for these in instances of low light or moving objects.
Advancements in digital age designs of zoom lenses have almost substituted the market for non-SLR cameras of interchangeable lenses now. Compact digital cameras, which are non-SLR come with fixed lenses. These have the capacity to from medium wide angle to medium telephoto. This results in the omission of extreme telephoto and fish eye.

The lenses, which are made for film cameras, can mostly be used on DSLR cameras. But this is only possible in instances of lens mounts similarity. This cannot be done in reverse cases.

Filed Under: Buying A Digital Camera

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