What isfocal lengthof lens

If a law enforcement officer stops you with a hand-held laser over 1mw in a prohibited area, depending on the circumstances, they can issue you a monetary penalty either under the Canadian Aviation Regulations or under the Contraventions Regulations on the spot unless you demonstrate a legitimate reason. Under the regulations, the fines are:

Intentionally interfering with the performance of flight crew to perform their duties is also a criminal offence. An example of such an offence would be intentionally shining a laser at an aircraft, which distracts a pilot and interferes with his or her ability to safely land the aircraft. Offenders will be charged under the Aeronautics Act.

Let's check the focal length of your lens. The range of the focal length available with the lens is printed on the lens. For example, focal lengths from 55 mm to 200 mm are available with the SAL55200-2 in the picture below. Also, on the mount side of the lens barrel (near the camera body), you can see the mark for the focal length currently set. In the picture below, the current focal length is 55 mm.

This photograph captured the details of a sunflower with a macro lens. With a macro lens, you can get this much closer to your subject.

Generally, lenses with a focal length of around 35 mm are called normal lenses, because they have an angle of view close to the human visual field. Lenses with a focal length shorter than this are called wide-angle lenses, and those with a longer focal length are called telephoto lenses. However, there are no strict standards for these terms. Use different lenses according to the subjects or images you want to shoot.

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You can also speak with your local astronomy club. They may have additional information for you. The Royal Astronomical Society of Canada provides information on green laser pointer usage.

Complete the Notice of proposal to conduct outdoor laser operation(s) [PDF, 1.6 Mb] and send it to the Transport Canada regional office closest to you.

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Lenses are divided into two types: zoom lenses, which have a variable focal length, and fixed focal length lenses, which have a fixed focal length. Some zoom lenses are versatile enough to range from wide angle to telephoto by themselves. In addition to being useful for everyday shooting, these lenses are especially convenient for travel when you want to carry as little baggage as possible.

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Use the map to learn where the new safety measure is in effect. If you plan on using your laser outside, such as in a park, be sure to check out the map before you go.

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This photograph was shot with a fixed focal length lens. By setting the aperture to a small f-number, the background is defocused to a large degree. Macro lenses, which allow you to take close-ups by getting closer to a subject, are also fixed focal length lenses. Although many recent zoom lenses have a macro feature with a fairly short focusing distance, their performance cannot match that of a dedicated macro lens.

You don’t want to be caught in possession of a laser where you shouldn’t be. As well, you certainly don’t want to be caught aiming one at an aircraft. If you’re caught, law enforcement can issue you a fine on the spot.

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Transport Canada has put in place permanent regulations to protect Canadians from laser attacks on aircraft. Find out where the safety measure is in effect and if it affects you.

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If you see someone pointing a laser at an aircraft, report it immediately to your local police, or local Crime Stoppers organization

On the other hand, if you use a fixed focal length lens, which does not have a zoom feature, you have to move in order to affect the composition. However, fixed focal length lenses are usually faster and have a wider aperture. They offer advantages in expression involving defocused backgrounds and the ability to use high shutter speeds in low-light situations, reducing image blur. In addition, they have superior rendering performance, so you enjoy excellent image quality that cannot be delivered by a zoom lens.

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Aiming a laser at an aircraft is not a bright idea. It’s a federal offence. Laser attacks can temporarily blind the pilot, putting all the people on board the aircraft at serious risk. In 2019, there were nearly 250 reported laser strikes on aircraft in Canada.

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If you are also convicted of intentionally interfering with an aircraft by using a laser, you could face one or both of:

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Focal length is the distance from the center of the lens to the image sensor (focal plane), and each lens has a different focal length. Focal length is important because it determines the range of a scene you can capture (angle of view). As shown in the following photographs, the shorter the focal length is, the wider range you can capture, while the longer the focal length is, the larger distant objects appear.

Focal length

The safety measure affects hand-held lasers of over 1 mW in power. These lasers may look like pens or flashlights. Often, people use them when giving a lecture or presentation.

If you receive a fine for an offence under the safety measure, you may choose to pay the amount of the fine or file a written request for an appeal with the Transportation Appeal Tribunal of Canada or at the respective provincial court.

If you’re stopped by law enforcement, you should be prepared to demonstrate why you’re in possession of a hand-held laser over 1 mW.

Pilots, complete the Directed bright light illumination incident report/questionnaire [PDF, 1.0 Mb] and send it to Transport Canada. You will find submission details at the bottom of the form.

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In this picture, 55-200 on the left side is the range of the focal lengths available with the lens. The white line on the right side indicates the focal length currently set.

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Incidents of lasers aimed at aircraft continue to threaten aviation safety in Canada.   In Canada, there were 1,965 laser attacks reported to Transport Canada and published in the Civil Aviation Daily Occurrence Reporting System (CADORS) between January 2015 and the end of December 2019. It’s a disturbing statistic—it means the safety of pilots, crew and passengers was put at risk during each laser attack.

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Law enforcement agencies will be trained to know when and where people may possess a laser. They will exercise their discretion and judgement when determining whether or not to issue a fine.

Lasers are often used in astronomy to point at stars or sky features. If you plan on aiming a laser into navigable airspace, you must get permission from Transport Canada.

Shining a bright light (such as a hand-laser) into airspace is now a designated provision, which means a law enforcement officer can issue you a fine under the Contravention Regulations or a monetary penalty on the spot. The fines are the same as for those possessing a hand-held laser where you shouldn’t be.

If you have any questions, please contact your Civil Aviation regional office, or the national headquarters at Civil Aviation Communications Centre contact form.