Canon lenses: 40 tips for using, choosing and buying Canon-fit glass

    | Photography Tips | 22/01/2014 00:01am

    How to use Canon lenses: telephotos & super zooms

    How to use Canon lenses: avoid dark corners

    21 Banish dark corners
    All lenses have a degree of corner darkening, although you may only notice it when the background is light in tone. Fast zooms and prime lenses used at their widest aperture settings are particularly prone to the effect.

    However, there are a variety of ways in which you can reduce the problem. Choosing a narrower aperture can remove the worst.

    Activate the Peripheral Illumination Correction function of your EOS camera to brighten up the corners at the time of shooting, or shoot Raw and use the vignette reduction tools available in Adobe Camera Raw or DPP.

    SEE MORE: Vignetting – quick fixes and how to avoid it entirely

    How to use Canon lenses: compress perspective

    22 Compress perspective
    Telephoto lenses ‘compress’ a scene (although it’s really down to the distance you’re shooting at rather than the focal length itself), which makes foreground and background elements appear closer than they are in reality.

    You can use this to make hills and mountain ranges look densely packed together, or to make the buildings in a city appear stacked in each other’s shadow.

    The only thing to be aware of is that telephoto lenses have a shallower depth of field than standard or wider lenses; this is useful for creating a blurred background in a portrait, but makes things difficult when you want to keep every ‘layer’ in a scene sharp.

    SEE MORE: 7 questions photographers must ask about their next piece of glass

    How to use Canon lenses: watch your shutter speed

    Shot at 1/640sec – sharp

    23 Watch the speed
    Longer focal lengths require faster shutter speeds to reduce the effects of camera shake compared to lenses with shorter focal lengths.

    On a full-frame EOS camera, a 50mm lens should deliver sharp pictures when it’s being handheld at 1/50 sec or faster – however a focal length of 500mm can require a minimum shutter speed of 1/500 sec or faster for the same result.

    How to use Canon lenses: watch your shutter speed

    Shot at 1/30sec – soft

    This means that wide apertures and higher ISOs are often required (eg f/4 at ISO800 for a 1/500 sec shutter speed), although Image Stabilization can help make the difference between a blurred shot and a sharp one.

    However, for consistently tack-sharp shots we’d always recommend a tripod when using lenses of 500mm or more.

    SEE MORE: Common mistakes at every shutter speed (and the best settings to use)

    How to use Canon lenses: 24 Attach a lens hood

    24 Attach a lens hood
    It’s common knowledge that a lens hood can shield the front element of a lens and prevent ghosting and flare from degrading picture quality. However, a lens hood is much more versatile than that.

    For instance, fit one when you’re shooting in damp conditions and you’ll protect the front element from raindrops and snow – it can even be used to hold a makeshift plastic rain cover in place when conditions turn torrential.

    If you do a lot of photography at the zoo or in an aquarium, consider a buying a third-party rubber hood that will enable you to press the lens against viewing windows and reduce reflections.

    25 Extend shooting time
    Image Stabilization is a common feature on telephoto lenses and superzooms from Canon, Sigma and Tamron, but it’s one of the many advanced features that can quickly drain batteries if used excessively.

    This is exacerbated in winter, when cold conditions cause camera batteries to lose their charge much more quickly. So when the temperature plummets, switch IS off and increase the ISO to give you faster shutter speeds for handheld photography – or reach for a tripod instead.

    Extend shooting time further by switching the lens to manual focus (MF) while you’re at it.

    What to consider when buying one of these Canon lenses…

    What to consider when buying one of these Canon lenses… floating aperture

    26 Floating aperture 

    Telephoto zooms that have a fixed aperture, such as a 70-200mm f/2.8 lens, can be very expensive. A more affordable option is a zoom with a ‘floating’ aperture (such as f/5-6.3), where the aperture gets smaller as you zoom into a scene, meaning less light makes it through to the camera sensor.

    27 How long? 

    The barrels of superzooms and some super-telephoto lenses can extend quite far at full zoom. This can make them a little unwieldy, particularly in the case of big lenses. Superzooms can almost double in length, but a zoom lock switch can prevent them from accidentally extending in transit.

    SEE MORE: 9 things you need to know about using a super-telephoto lens

    28 Extend the reach
    A teleconverter fits between the lens and the camera and multiplies the effective focal length of the lens by 1.4x (with the Canon  EF 1.4x III Extender) or 2x (EF 2x III Extender). The downside is slower autofocus, a narrower maximum aperture, and slightly reduced image quality.

    What to consider when buying one of these Canon lenses… keep it clean

    29 Keep it clean 

    Dust and other marks on the front element can reduce image quality, so keep it spotless. Invest in a bulb blower, brush and microfibre lens cloth – and use them in that order. Buying clear protective filters for all your lenses can provide a barrier against knocks and inclement weather.

    SEE MORE: How to clean a camera lens

    30 Get closer 

    Although telephoto lenses offer greater reach, you may still need to be surprisingly close to a subject for it to fill the frame.

    However, you’ll be limited by the minimum focus distance of the lens. To focus closer than the lens allows, you’ll need to buy an extension tube – a simple adaptor that bayonets onto the rear of the lens.

    PAGE 1 – How to use Canon lenses: standard & wide-angle zooms
    PAGE 2 – How to use Canon lenses: prime lenses
    PAGE 3 – How to use Canon lenses: telephotos & super zooms
    PAGE 4 – How to use Canon lenses: specialist lenses


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    Posted on Wednesday, January 22nd, 2014 at 12:01 am under Photography Tips.

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