DSLRs and compact system cameras usually include a kit lens, which is good for everyday shooting - but expanding your kit with more specialised lenses will enable you to get much more creative with your photography. Each lens offers a different focal length, which is measured in millimetres (mm). Each focal length will give you different visual effects depending on the type of sensor in your camera and the aperture size you are using.

Telephoto zoom lenses (such as 55-200 mm models) enable you to zoom in close to distant subjects. Wide angle zoom lenses (12-24 mm, for example) are great for landscape and architectural photography as they enable you to fit more of a scene into the shot.Fixed or prime lenses (like a 50 mm model) are best for portrait shots with professional soft-focus backgrounds.

Some lenses have built-in image stabilisation or vibration reduction, which can help achieve sharp images when you’re using slow shutter speeds and need the camera to stay very still. Stabilisation is also useful when zooming in very close to your subject, as camera shake is more pronounced.

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Camera manufacturers produce lenses that are compatible with the camera bodies they make, so it’s important to use the correct lens with your camera. Lenses are not often cross-compatible: you cannot use a Canon lens on a Nikon camera, without expensive adapters. As well as branded lenses, there are third party manufacturers such as Sigma who create lenses that are compatible with different camera brands, giving you more options when looking for new optics.
It is important when buying a lens to ensure it is compatible with your camera. There are 3 main things to consider:

1) Brand
2) Camera type
3) Sensor type View all lenses for compact system cameras
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Focal Length

A lens' focal length determines the angle of view – i.e. how much of a scene will be captured - and the magnification - how large individual scene elements will be. Focal length is represented in millimetres (mm) e.g. 18-55 mm, and can be seen on the lens barrel.

Longer focal lengths – such as 200 mm – provide a narrower the angle of view and higher magnification levels. Shorter focal lengths (such as 10 mm) give you a wider angle of view and lower magnification levels.

The effects on angle of view, magnification and image quality are dependent on whether you’re using a zoom or prime (fixed focal length) lens, how large the lens’ maximum aperture is and your camera’s sensor size.



Aperture is controlled in a camera’s lens and adjusts the amount of light that reaches the sensor.

Using either a manual adjustment ring on the lens or automatic methods, the size of the circular hole that allows light in is changed. This hole is formed by the converging blades of the shutter, which move inwards or outwards to make the aperture smaller or larger.

Aperture size is measured in units called f-stops. The lower the f number, e.g. f/1.8, the wider the aperture and the more light is let into the camera.

A small aperture (high f number) produces an image that is in full sharp focus with a deep depth of field– great for landscape photography. A large aperture (low f number) produces an image where the subject is sharp and detailed, but the rest of the image is in soft focus – this shallow depth of field is great for macro and portrait shots.


Image stabilisation

Image stabilisation, or vibration reduction, refers to lens technology used to obtain sharp, blur-free images. Image stabilisation is most useful when using:

1) Low Light
2) Long Focal Lengths
3) No Tripod View lenses with image stabilisation
Image stabilisation

Prime lenses

Prime lenses offer a fixed focal length (for example 50 mm) that makes them especially suitable for specific applications. They are generally much smaller and lighter than wide-angle or telephoto zoom lenses.

Certain prime lenses are great for professional-looking portraits (such as a 50 mm f/1.8 lens), giving you sharply-focused subjects and soft- focus backgrounds (also known as bokeh).

Wide-angle prime lenses (such as 24 mm models) are ideal for architectural photography or landscapes, fitting more of a subject into a natural-looking field of view. Macro lenses allow for extreme close-ups, making them ideal for photographing small insects, plant life, clothing details and more.

Prime lenses generally admit a lot of light, allowing you to shoot bright, detailed pictures and making them especially good for low light conditions. For this reason, prime lenses with large apertures are sometimes referred to as ‘fast’ lenses.

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Telephoto Lenses

Telephoto zoom lenses offer a variable focal length (such as 55-200 mm), allowing you to zoom in close on distant subjects. Zoom power and image quality depend on the type and size of sensor in your camera.

They are great for applications like sports and wildlife photography, when you need to get close-up and detailed images of subjects that are far away or inaccessible, while remaining discreet.

Look out for telephoto lenses with image stabilisation or vibration reduction, as this feature will help to keep the lens steady when shooting at high zoom. It is particularly helpful if you find yourself without a tripod.

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Wide Angle Lenses

Wide angle lenses generally have low focal lengths, such as 10-22 mm. They are available in fixed focal length or zoom formats. Field of view and image quality are dependent on the type and size of sensor in your camera.

They are especially good for landscape, interior or architectural shots as they enable you to fit more of a scene or subject into the shot. Wider angles can also create subtle perspective effects that give additional character to your subjects, depending on the type of camera and settings you are using.

You can even use a wide angle lens to capture unique-looking action shots, whether it’s skateboarders in action or your kids running across the lawn.

Combine your wide angle lens with a UV filter to reduce haze in outdoor shots, or enhance contrast and cut out reflections in water or glass with a polarising filter.

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