“How are we going to protect ourselves, protect our privacy when we leave our front door?” said Dave Maass, senior investigative researcher at the San Francisco-based digital rights nonprofit Electronic Frontier Foundation. “How do we ensure that as all these technologies advance, our privacy and our personal movements are also protected?”

Using a telephoto zoom lens will totally change the overall feel of the image. Especially when photographing subjects that are further in distance from you. Not only does it bring the main subject closer, but it also brings all the background elements closer as well.

Scott Urban, who requested his face not be photographed, with a pair of Reflectacles glasses which prevent facial recognition, at his studio on Feb. 26, 2020, in Chicago. Urban began designing them in 2015 and they became available for purchase in 2017. He has several designs and accessories.

Scott Urban, who requested his face not be photographed, with a pair of Reflectacles glasses which prevent facial recognition, at his studio on Feb. 26, 2020, in Chicago. Urban began designing them in 2015 and they became available for purchase in 2017. He has several designs and accessories.

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Illinois has one of the strictest laws in the nation protecting biometric data, which can include data from facial, fingerprint and iris scans. The 2008 law mandates that companies collecting such information obtain prior consent from consumers, detail how they’ll use it and specify how long the information will be kept. The law also allows private citizens, rather than just governmental entities, to file lawsuits over the issue.

The technology collects data to create a map of someone’s face. Privacy advocates worry that mass use of facial recognition software, especially in public places, could erode personal privacy and be used to track people’s movements.

Zoom lens are used for instances where you want to fill the frame with a subject that is far in distance and you wish it to appear much closer. Good examples would be sports or animal photography where you cannot be physically close to the subject. Or maybe it is possible but you’d rather not disturb the subject, choosing instead to photograph it naturally. This is particularly useful for street photography where you don’t want the person to know they are being photographed until after the shot is taken.

“There’s a certain kind of utility to it,” he said. But “I don’t think we’re ever going to see mass adoption of them outside of very particular contexts.”

Look on the side of your lens and check if it has a focus limit switch. You will recognize it because it will have a distance metering associated with it. For example my Canon lens has a switch on the side that says 1.8m -∞, as well as 6.5m-∞. If your lens doesn’t have this switch then ignore this section.

Lens zoomprice

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A telephoto zoom lens is my favorite piece of glass. Over the years I’ve photographed with Canon, Nikon and Sigma telephoto zoom lens. Before we let you in on the secrets of using these long lenses, we’ll first discuss a couple of basics.

Most customers know the protections Reflectacles and other privacy devices offer only go so far — especially when the device is wearable, and the user doesn’t plan on wearing it 24/7.

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Another issue: The devices typically only protect against one type of potential privacy violation, said Matthew Kugler, an associate professor at Northwestern University’s Pritzker School of Law. Reflectacles, for example, are effective against certain cameras and facial recognition, but they wouldn’t prevent a person’s phone from being tracked.

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Blurring backgrounds is easier with a telephoto lens than it is with a wide angle lens. Set your camera aperture on f/8 or lower, zoom the lens out to its longest focal length, and get as close to the subject as possible while still being able to focus. You also need to ensure as much distance as possible between the subject and any background elements. You won’t see any blur if the subject is against a brick wall.

The chunky, thick-framed glasses Scott Urban makes in his Humboldt Park workshop look like normal eyeglasses, but when viewed on a security camera, the wearer’s face becomes a shining orb.

A normal focal length is known to be 50mm. When you shoot with a lens set at 50mm focal length, the subject will be photographed in size as you saw it in real life. If you zoom your lens out to 100mm focal length, the image will now be magnified X 2 so the subject appears much closer. Therefore the definition of a telephoto zoom lens is one that can be magnified higher than 50mm focal length.

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Urban declined to comment on sales figures. He makes the glasses full time, and said the business is profitable. He launched Reflectacles via Kickstarter in late 2016, and started shipping them to backers the next year. In all, 311 backers pledged more than $41,000 during that campaign.

The minimum focusing distance of the SELP1650 lens above is from 0.25 m (25 cm) to 0.30 m (30 cm), depending on focal lengths.

Such is the rub with devices meant to thwart technologies: They must be more convenient than the technologies themselves.

Just because it’s a long lens doesn’t mean you need to use a tripod. In fact I rarely use a tripod when using my telephoto lens. I find them too restrictive when photographing birds and wildlife.

What is telephotolensin mobile

U.S. senators have probed Clearview AI, questioning its sharing of facial recognition technology with other countries and whether it could be used for mass surveillance. And in November, Sen. Edward J. Markey, D-Mass., released findings of an investigation into Ring that revealed “little to no privacy policies or civil rights protections for video collected by the technology.”

Tech giants and other companies have had to contend with the law. Earlier this year, Facebook ended a yearslong legal battle when it agreed to pay $550 million to Illinois customers to settle allegations that its facial tagging feature violated their privacy rights.

“I think most people are not aware of how aggressive and how powerful technology is,” said Crowley, a Portage Park resident. “When you say it, it sounds paranoid, but facial recognition software is so, so fast.”

Bestlens zoom

The concerns surrounding such uses of facial recognition are multi-fold. Some worry the technology has imperfections, and its use could result in misidentification. For others, the main issue is lack of consent.

The technology is increasingly used by law enforcement and touted by tech companies, in part because advancements in security cameras allow them to record higher-quality images.

They block the facial recognition on iPhones, and obstruct infrared security cameras, he said. But they might not stop other types of facial recognition software.

Reflectacles, as the glasses are called, are among a growing number of devices developed to protect individual privacy as facial recognition technology becomes cheaper, faster and more commonplace.

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Scott Urban's reflectacles glasses can thwart facial recognition software by reflecting or blocking the infrared light of security cameras.

If you are photographing long exposures or landscapes with a telephoto lens then it is best to use a tripod. If using a tripod, look on the side of your lens for letters VR (vibration reduction for Nikon) or IS (image stabilization for Canon) and turn them off.

However you do need to make sure your shutter speed is longer than the focal length of the lens. For example, when you zoom your lens out to 200mm, make sure the shutter speed is at minimum 1/200th of a second or faster. If you zoom it to 300mm focal length, then the shutter speed needs to be at least 1/300th of a second and so forth. This will give you the best chance of getting a sharp image while hand holding your camera.

All lenses require different techniques for photographers to grasp. Just because you know how to use one lens doesn’t mean you can use the same technique on the next. As strange as it sounds, telephoto and macro lenses have a lot in common. Personally I treat them much the same way.

Why is this important to know? There has been many instances where I’ll be trying to photograph a subject that is only a few meters from me and the lens keeps swimming in and out, not able to focus. I’ve fixed this problem every time by setting the correct metering. ie I set 1.8m -∞ for subjects closer than 6.5 meters away, and set 6.5m-∞ for everything 6.5 meters or further in distance.

Canon telephotolensfor wildlife

For years, social media sites have used facial recognition technology in tagging features. Popular apps also have used it to find customers’ likeness in works of art or other images. In 2017, Apple rolled out a feature on the iPhone X that uses facial recognition to unlock the screen.

TelephotolensCanon

Others have material in the rims that reflect visible and infrared light. To a security camera, the wearer’s eyes become a glare.

Sigma telephotolens

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A Clearview AI representative did not respond to requests for comment. Ring spokeswoman Che’von Lewis said in a statement that Ring does not use facial recognition, and that customer privacy and data security is “foundational” for the Amazon-owned company.

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“People shouldn’t have to walk around with really clunky glasses or really complicated T-shirts in order to protect their privacy,” said Electronic Frontier Foundation’s Maass. “We should have policies in place that understand that democracy does require a certain amount of anonymity.”

Canon EF telephotolens

Brian Crowley, 41, a software product designer, said he keeps up with facial recognition technology advancements and the benefits they offer. He also worries about the problems they could cause.

He’s also aware that tradeoffs are involved. Crowley owns a pair of Reflectacles but said he likely won’t wear them every day because they would block him from using the facial recognition feature to unlock his phone.

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When photographers hear the term telephoto they usually imagine a long lens between 70 and 500mm focal length or longer. Personally I’ve used 3 different brands and the technique for using them is basically the same.

Urban, the 38-year-old creator of Reflectacles, said wearing his glasses protects people from facial recognition technologies in public spaces.

The efforts extend into other areas of data privacy as well — chunky bracelets meant to jam Amazon Echo and other devices from listening to conversations, and phone pouches that block tracking signals.

That’s where entrepreneurs are stepping in. Designers, artists and researchers around the world have invented masks that block facial recognition technology. There are also glasses that use different tactics than Reflectacles, and even clothing with faces on the fabric meant to confuse the cameras.

A New York company called Clearview AI is selling facial recognition tools to law enforcement agencies around the country — including in Illinois — that allows them to tap into a database of photos scraped from social media. The Chicago Police Department uses Clearview’s software to compare photographs of suspects against public information, according to department spokeswoman Maggie Huynh.

Reflectacles do block facial recognition in certain situations, said Electronic Frontier Foundation’s Maass, who owns two pairs of the glasses. He teaches at the University of Nevada, Reno, and uses the glasses as a demonstration in surveillance and cybersecurity lectures.

For example, I live in a coastal town where I photograph boats anchored out at sea with islands in the background. If I use a wide angle landscape lens, the islands in the background seem much smaller and insignificant than when I use my telephoto zoom lens. For these types of shots I prefer to see layers. Hence, I’ll use my telephoto zoom lens.

Reflectacles products, which range from $48 clip-on lenses to $164 glasses, use different methods to block facial recognition. The base model has regular frames but the lenses themselves block infrared light, so the wearer’s eyes don’t appear on infrared security cameras.

Lens zoomnikon

The focus limit switch tells the camera where to focus within certain ranges in distance. For example, if you set the switch to 6.5m-∞ then the camera knows not to worry about focussing on anything closer than 6.5 meters. Knowing this information, your camera will shoot faster.

Sales of Amazon’s Ring doorbell, which allows users to livestream video of the area outside their front door, are surging, creating webs of cameras in neighborhoods.

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Long telephoto zoom lenses are perfect for photographing macro subjects. They allow you to stand further away from the subject so not to scare it away. This has its obvious advantages when shooting timid subjects like dragonflies and insects.

“Everybody just doesn’t like the erosion of privacy and there’s no form of consent … it’s just being used on them,” he said. “What I’m trying to do is give people the (option to) opt out.”

The first time I used my Canon EF 70-200mm f/4L USM lens on a tripod, was to photograph beautiful night shots of the Opera House in Sydney. Looking at the images on my computer I saw they were all out of focus and appeared to have symptoms of camera shake. I later found that by keeping this switch turned on, VR / IS will look for camera vibration and when it doesn’t find it, it keeps looking. Hence in itself causing camera shake. So I went out the next night with IS turned off and captured the image seen below.