Η ΓΝΩΣΗ ΤΗΣ ΣΤΟ ΣΧΟΛΕΙΟ ΚΑΙ ΠΕΡΑ ΑΠΟ ΑΥΤΟ
How do you send drugs to specific parts of the body so they do their job and avoid causing side effects elsewhere? According to researchers at Stanford University, the answer is a combination of nanoparticles, a pulse of ultrasound, and sugar.
Category: Medical Innovations, Body & Mind
I can't imagine my desktop setup without a second screen. It's made researching and writing a whole lot easier, particularly when I'm looking at multiple browser tabs, videos, and a note-taking app all at once.
Category: Consumer Tech, Technology
Tags: Keyboard, Productivity, Kickstarter, Touchscreen
Attention photographers: Tuesday, August 19th, is World Photography Day!
World Photography Day is a global celebration that honors Louis Daguerre's invention of the daguerreotype. After presenting his invention to the French Academy of Sciences in 1839, Daguerre arranged to transfer the rights to the process to the French government in exchange for a lifetime pension for himself and Isidore Niépce, son of Nicéphore Niépce, with whom he had collaborated in earlier years. On August 19, 1839, the government of France presented the invention as a gift "free to the world."
We've decided to celebrate World Photography Day by taking pictures, and we're challenging you to do the same. What's more, we want to see the photos you take so we can share them on our homepage. Think of this as a mini photo challenge.
How to participateThat's it! We'll pick our favorites and publish them in a slideshow on the DPReview homepage later this week, along with similar photos taken by DPReview's staff.
You can use any camera or technique, but if you manage to shoot a daguerreotype between now and then, we can pretty much guarantee your photo will be selected.
Bring on the photos!
*Or later this week. As long as you take the photo any time after this article is published, we'll accept it.
Attention photographers: Tuesday, August 19th, is World Photography Day!
World Photography Day is a global celebration that honors Louis Daguerre's invention of the daguerreotype. After presenting his invention to the French Academy of Sciences in 1839, Daguerre arranged to transfer the rights to the process to the French government in exchange for a lifetime pension for himself and Isidore Niépce, son of Nicéphore Niépce, with whom he had collaborated in earlier years. On August 19, 1839, the government of France presented the invention as a gift "free to the world."
We've decided to celebrate World Photography Day by taking pictures, and we're challenging you to do the same. What's more, we want to see the photos you take so we can share them on our homepage. Think of this as a mini photo challenge.
How to participateThat's it! We'll pick our favorites and publish them in a slideshow on the DPReview homepage later this week, along with similar photos taken by DPReview's staff.
You can use any camera or technique, but if you manage to shoot a daguerreotype between now and then, we can pretty much guarantee your photo will be selected.
Bring on the photos!
*Or later this week. As long as you take the photo any time after this article is published, we'll accept it.
Hennessey has quietly unveiled its shiny new Venom F5 Revolution LF hypercar, which makes other hypercars look… well, subdued. Not only is it monstrously powerful, it’s also extremely exclusive, limited to just one example.
Category: Automotive, Transport
Tags: Hennessey, Hypercar, World's Most Powerful, Ice, Supercars, Convertible
Sigma has announced the 200mm F2 DG OS Sports, a fast telephoto prime aimed at sports and portrait photographers, available for L mount and Sony E mount. The company says it's the first of its kind for full-frame mirrorless cameras, though it harkens back to some classic pieces of glass that are still sought after today.
The lens is made from 19 elements in 14 groups, with two FLD and two SLD elements. It has an 11-blade aperture and a minimum focusing distance of 1.7m (5'6"). It can accept 105mm filters. The lens is dust and splash-resistant, and has a water and oil-repelling coating on the front element.
Autofocus duties are handled by a linear motor, and the lens has optical stabilization that the company says can provide 6.5EV of improvement. There are two optical stabilization modes, one for general use and one for panning shots, and it can also be turned off.
The 200mm F2 DG OS Sports has plenty of buttons and switchesAs with many professional-grade lenses, the 200mm F2 DG OS Sports has plenty of buttons and switches for controlling it. There are three AF-L buttons, which should make them easy to reach no matter what orientation you're using the lens in, and two focus limiter settings. It also has two custom modes, which can be configured to control the lens' AF speed, focus limiter settings and OS mode using the optional Sigma USB dock.
The lens' aperture ring can also be locked, and toggled between clicked and declicked modes. The tripod foot is a new design too; it can be mounted directly to Arca-Swiss tripod heads, and has clicks at 90° increments. Sigma says it's also slightly longer than its other tripod feet, making it nicer to use as a carrying handle.
Sigma says the white paint on the lens is meant to minimize how much sunlight it absorbs, making it so the lens doesn't get hot, causing slight thermal expansion that could affect image quality.
This is currently the only full-frame 200mm F2 prime made by a major manufacturerIt's currently the only 200mm F2 prime lens being made by a major manufacturer for full-frame mounts, but we wouldn't be surprised if it becomes relatively popular among its target audience. Canon and Nikon both made 200mm F2 lenses for their respective DSLR mounts, which are still loved by certain types of shooters and fetch high prices on the used market to this day.
The Sigma 200mm F2 DG OS Sports will be available in early September, just in time for basketball season in the US. It will cost $3299.
Buy now:
Buy at B&H Photo Sample GalleryPlease do not reproduce any of these images on a website or any newsletter/magazine without prior permission (see our copyright page). We make the originals available for private users to download to their own machines for personal examination or printing; we do so in good faith, so please don't abuse it.
Sample galleryThis widget is not optimized for RSS feed readers. Click here to open it in a new browser window / tab.Press Release:
Sigma Announces World’s First 200mm F2 Telephoto Prime Lens for Full-Frame Mirrorless CamerasRonkonkoma, NY, August 19, 2025 – Sigma Corporation of America, the US subsidiary of Sigma Corporation (CEO: Kazuto Yamaki. Headquarters: Asao-ku, Kawasaki-shi, Kanagawa, Japan), is pleased to introduce the Sigma 200mm F2 DG OS | Sports lens for full-frame mirrorless cameras, available in early September 2025. It is the world's first 200mm F2 telephoto prime lens designed for full-frame mirrorless.
The Sigma 200mm F2 DG OS | Sports is a large-aperture, telephoto prime lens ideal for shooting portraits and indoor sports. The F2 maximum aperture facilitates faster shutter speeds for capturing fast action, and it creates remarkable bokeh, the artistic effect that beautifully blurs backgrounds and foregrounds, drawing attention to the subject and creating a greater sense of depth. Sigma is renowned for its large-aperture lenses that combine these qualities with exceptional sharpness and high resolution. And as a part of Sigma’s Sports line, this new lens also features rugged build quality and weather resistance that lets users work in challenging environments without worrying about their equipment.
Outstanding edge-to-edge resolution is achieved, even at maximum aperture, by adopting an optical design of 19 elements in 14 groups, including 2 FLD and 2 SLD glass elements. Aberrations are thoroughly corrected, and flare and ghosting are kept to a minimum.
Swift, accurate autofocus is driven by Sigma’s HLA (High-response Linear Actuator) motor, allowing for fast subject acquisition and tracking. Plus, built-in optical stabilization utilizing Sigma’s OS2 algorithm makes it possible to shoot handheld and maintain sharpness, even in fast-moving sports scenes.
Additionally, the ultra-tough build quality of Sigma’s Sports line is evident with a dust and splash-resistant structure, a water and oil-repellant coating on the front element, thermal insulation paint, and a newly-designed tripod socket for mounting to Arca-Swiss type tripods.
The Sigma 200mm F2 DG OS | Sports lens will be available in early September at authorized Sigma dealers in the US for Sony E-mount and L-Mount for a retail price of $3,299 USD.
Sigma 200m F2 DG OS Sports Specifications: Principal specificationsLens typePrime lensMax Format size35mm FFFocal length200 mmImage stabilizationYesLens mountL-Mount, Sony E, Sony FEApertureMaximum apertureF2Minimum apertureF22Aperture ringYesNumber of diaphragm blades11Aperture notesRounded diaphragmOpticsElements19Groups14Special elements / coatings2 FLD, 2 SLD, water and oil-repelent coatingFocusMinimum focus1.70 m (66.93″)Maximum magnification0.13×AutofocusYesMotor typeLinear MotorFull time manualYesFocus methodInternalDistance scaleNoDoF scaleNoFocus distance limiter1.7-3m, 3m - infinityPhysicalWeight1800 g (3.97 lb)Diameter119 mm (4.69″)Length203 mm (7.99″)SealingYesColourWhitePower zoomNoFilter thread105 mmHood suppliedYesHood product codeLH1139-01Tripod collarYesSigma has announced the 12mm F1.4 DC, an APS-C prime for Sony E, Fujifilm X and Canon RF mount. Its 18mm equiv. (19mm equiv on Canon) focal length makes it the widest APS-C prime the company offers, and it not only features the company's sharp new branding, but a few other features that are new to its lineup of APS-C primes.
The lens is made up of 14 elements in 12 groups, with two SLD elements and three aspherical elements. It has nine aperture blades and a minimum focusing distance of 0.17m (6.8").
It can accept 62mm filters, and the Sony version weighs 225g (7.9oz). Sigma says that makes it the lightest lens in its Contemporary prime lens lineup, and also says it was able to make it even shorter than its 16mm DC prime, despite its wider focal length.
It's the first dust and moisture resistant prime in Sigma's DC seriesIt's also the first prime in the series to gain dust and moisture resistance. Perhaps more excitingly, it's the first of Sigma's APS-C primes to have an aperture ring on the E and X mount versions, which is replaced by a multi-function control ring on the RF version.
These improvements make us wonder if there's room for Sigma to make second-generation versions of the rest of the primes in its APS-C lineup. The 16, 23, 30 and 56mm F1.4s are still quite good lenses, but it's hard not to wish for lighter, more compact versions with aperture rings and weather sealing now that we know it's possible.
The Sigma 12mm F1.4 DC will be available in early September at an MSRP of $629.
Buy now:
Buy at B&H Photo Sample GalleryPlease do not reproduce any of these images on a website or any newsletter/magazine without prior permission (see our copyright page). We make the originals available for private users to download to their own machines for personal examination or printing; we do so in good faith, so please don't abuse it.
Sample galleryThis widget is not optimized for RSS feed readers. Click here to open it in a new browser window / tab.Press Release:
Sigma Announces Compact, Ultra-Wide 12mm F1.4 DC | Contemporary Lens for APS-C Format Mirrorless CamerasRonkonkoma, NY, August 19, 2025 – Sigma Corporation of America, the US subsidiary of Sigma Corporation (CEO: Kazuto Yamaki. Headquarters: Asao-ku, Kawasaki-shi, Kanagawa, Japan), is pleased to introduce the 12mm F1.4 DC | Contemporary lens for APS-C format mirrorless cameras, available in early September 2025.
The 12mm F1.4 is the smallest and lightest of Sigma’s five DC Contemporary prime lenses, weighing in at only 7.9 ounces, ideal for travel and everyday use for both photography and video. The ultra-wide angle of view is perfect for landscape and night sky photography, as well as video and vlogging where it’s necessary to record yourself and your surroundings at the same time. The large F1.4 aperture provides great performance in low light, and also helps blur backgrounds to eliminate distracting elements while making the subject pop. As part of Sigma’s Contemporary line, this portable powerhouse combines simple operation with outstanding image quality, plus the latest in technical innovations to keep the lens as compact as possible. All of the photographic notes are hit with this lens.
In fact, this lens features the widest angle of view of any F1.4 lens designed for APS-C cameras, and offers exceptional optical performance across the entire frame, even wide open, making it an excellent choice for low-light situations. With three double-sided aspherical lenses and two SLD glass elements, sagittal coma flare is well-corrected, ensuring crisp, clear images when photographing starry skies.
In addition, the 12mm F1.4 DC | Contemporary is a great choice for video, with minimal focus breathing, a manual aperture ring (control ring on Canon RF Mount), and smooth, responsive autofocus, ideal for tracking moving subjects. Its compact size makes it perfect for handheld or gimbal use, particularly vlogging, streaming, and other settings where a wide angle of view is essential.
Furthermore, the lens features a dust and splash-resistant structure, plus a water and oil-repellant coating on the front element, to ensure high performance in virtually any conditions.
The Sigma 12mm F1.4 DC | Contemporary lens will be available in early September at authorized Sigma dealers in the US for Sony E-mount, Fujifilm X Mount, and Canon RF Mount for a retail price of $629 USD.
Sigma 12mm F1.4 DC specifications: Principal specificationsLens typePrime lensMax Format sizeAPS-C / DXFocal length12 mmImage stabilizationNoLens mountCanon RF-S, Fujifilm X, Sony EApertureMaximum apertureF1.4Minimum apertureF16Aperture ringYesNumber of diaphragm blades9OpticsElements14Groups12Special elements / coatings2 SLD, 3 asph.FocusMinimum focus0.17 m (6.69″)Maximum magnification0.12×AutofocusYesMotor typeStepper motorFocus methodInternalDistance scaleNoDoF scaleNoPhysicalWeight225 g (0.50 lb)Diameter68 mm (2.68″)Length69 mm (2.72″)ColourBlackFilter thread62 mmHood suppliedYesTripod collarNoOne of the most dangerous microorganisms on Earth, Naegleria fowleri has a well-earned nickname as the "brain-eating amoeba," because of the almost 100% fatal infection it causes. And it's now been found swimming around in the treated drinking water supplied to two towns in Australia.
Category: Infectious Diseases, Illnesses and conditions, Body & Mind
Tags: Infections, Brain, Water, Micro-organisms
Despite what some movies may suggest, it's currently impossible to transplant functional, seeing human eyeballs. Scientists are taking a big step in that direction, however, with the development of an eye-transplant device known as the eye-ECMO.
Category: Medical Devices, Medical Innovations, Body & Mind
Tags: University of Miami, Eye surgery, Vision, Blindness, Transplant
There's a lot to love about the conventional lithium-ion batteries we use in our gadgets and electric cars, but they still pose a fire hazard because of the flammable liquid electrolyte inside.
Category: Mobile Technology, Consumer Tech, Technology
Tags: EDC, Battery, Gadgets, Wireless Charging, Kickstarter
Can-Am has unveiled a new Outlander Electric and Outlander Max 6x6 ATV, as well as a new Maverick X rc side-by-side. The fun doesn't stop there, though, as the company has also debuted the first ATV with a semi-active suspension system.
Category: Outdoors
Tags: Can-Am, ATV, Side-by-side, Off-road, Electric Vehicles
Last week, we kicked off a new series in the DPReview forums to spark conversation and get people thinking. The Question of the week series will ask a new question in the Open Talk forum most Wednesdays, covering a wide range of photography-related topics.
Our inaugural query asked what five questions you should ask yourself when buying a new camera. We were excited to see how many of you responded, providing lots of responses and things to think about when purchasing your next camera. In fact, we initially planned on highlighting five responses from the community, but decided to showcase 10 because of all the great responses.
There were some general trends, with most of you highlighting the importance of knowing your budget, what genre(s) you would like to photograph and what size you'd prefer. Here are some of the other questions that popped up.
Does it work with the lenses you need?Many of you pointed out the importance of lens selection. Whether you're choosing a first camera or an upgrade, knowing what lenses you'll be able to use is important. For example, NiVoak said, "Should my new camera be compatible with my current lenses, or will I need to upgrade my lenses too?" Needing to upgrade lenses can add a significant cost, so that's a great reminder to folks.
Do you actually need a new camera?Most of you also suggested asking yourself whether you truly need the new camera or if you are suffering from Gear Acquisition Syndrome (GAS). For example, user danijel973 suggested, "Is something really wrong with my current camera, or am I just having gear acquisition syndrome?" In that same vein, many of you pointed out that it's essential to ask yourself if a new camera would address issues with your current one or offer anything new. Gato Amarillo asked, "What specific advantage(s) do I gain? Stress on 'specific' - list it or them."
Is it for fun or for business?Some of you differentiated between professionals and enthusiasts, which is a worthwhile consideration. For pros, Bobapingu suggested that there needs to be a "cost/benefit analysis (by numbers) to ensure the investment will benefit the business and pay for itself." Others pointed out that enjoyment is also an important thing to consider. For example, hampshirejohn only had one question: "Will it increase my enjoyment of photography, either in the process of taking photos or in improved images, to an extent that justifies the cost?"
What else could you do with the money?We also enjoyed that some of you considered what else the money could be spent on instead of that new camera. TXforester suggested asking yourself, "What could I do if I spent that money another way? Such as take a trip to photograph something on my bucket list." If your current camera is largely meeting your needs, spending that money on a trip or a new lens may be the better move.
Less common questionsWe also appreciated the less common responses. For example, motormatic had the unique suggestion to consider support after your purchase: "How well is the new camera supported by local dealers and repair shops?" Some of you also pointed out that there will likely be more than five questions to ask. Maoby listed five questions with instructions to answer without lying and followed up with this advice: "If you honestly answered these five questions, you are ready for the next five."
Of course, there were some entertaining responses, too. Horshack asked, "Do I have any kidneys left to sell?" We all feel the high prices of cameras, so this one made us chuckle. There is also BobsYourUncle's single question: "Does this camera look almost the same as my 25 others so my wife won't notice?" Lastly, Myles Baker had a very important consideration: "Will I get torched in the DPR comments sections for buying the 'wrong' camera?"
The thread is still open if you haven't had a chance to share your questions yet but would still like to participate. Thank you to everyone who chimed in, and we can't wait to hear your responses to this week's question come Wednesday!
When it comes to clipless pedals for road bikes, it's important that they be lightweight and easy to engage. Tourelly's Road Ceramic Ti pedals boast both features, thanks to a unique design that is claimed to make them "the lightest in their class."
Tags: Cycling, Pedal, World's Lightest
Dozens of water-harvesting pods are set to be deployed along the sea floor off the coast of California as the United States ramps up its first subsea desalination project. The effort is expected to produce 60 million gallons (227 million liters) of fresh water per day.
Category: Environment, Science
Tags: Desalination, California, Water, water technology, Salt-water, Ocean
Just over two weeks after retailers announced price increases for many of Fujifilm's products in the US, it's happening again. The news comes directly from the company itself this time, which put out a statement saying it will "further adjust prices" in light of "volatile market conditions."
The new pricing will go into effect on August 30th. Fujifilm hasn't said how many products will be impacted, though it tells DPReview that it will affect most of its lineup, with two notable exceptions. The recently released X half and X-E5 will keep their respective launch prices, with the rest of the company's lineup moving around them.
The company set the X half and X-E5 prices to avoid nasty surprisesWhile those cameras may have appeared relatively expensive at launch, it seems like Fujifilm left room for precisely this kind of situation. Victor Ha, the Vice President of the Electronic Imaging and Optical Devices Divisions of Fujifilm North America, explained that the company set the prices of those two cameras to ensure there wouldn't be any nasty surprises for customers who had pre-ordered them. "New camera day is awesome, we get that. It can be such a rare and exciting occasion, we don't want anything to spoil that enjoyment, so that their first thought is to run outside and take a picture."
Those with the infamously difficult-to-get X100 VI on backorder may not be as lucky. That camera will be affected by the price changes, so retailers will have to decide how they handle people who placed their order prior to the price increases but haven't received it yet.
X-100 VI hopefuls may not be so luckyAs with the increases we saw earlier this month, the changes likely won't be the same for each camera, though we're told its general pricing scheme should stay the same. That makes sense, given the ever-changing nature of the current US tariffs and Fujifilm's recent tactic of moving manufacturing for some of its US-bound cameras back to Japan.
The company doesn't directly lay blame on those tariffs, though, and we were told the current round of increases factored in other manufacturing circumstances and is meant to be a long-term solution to various uncertainties. Hopefully, this will avoid another scenario where the company has to make two pricing increases in quick succession.
We'll be sure to keep you updated when we get the new pricing details, and we'll keep an eye out for any other companies following suit in the coming weeks and months.
Fujifilm press release:
The global marketplace continues to present business challenges, driven by the volatile market conditions facing manufacturers, retailers, and consumers alike. With these changes and the instability of the marketplace, we have made the business decision to further adjust prices to accommodate for these global changes. As we navigate the current market situation, Fujifilm is doing all we can to work with our retailers and consumers to weather this storm together. We appreciate your continued support.
Solid oxide fuel cells (SOFC) can help extend the range of electric cars using a range of fuels, and run stationary power generators, with minimal emissions. The trouble is, these cells require awfully high temperatures to operate.
Tags: Clean Energy, Hokkaido University, Fuel Cell
A loss of smell can be one of the earliest warning signs of Alzheimer’s disease, but the reasons behind this sensory change have been unclear. Now, a study reveals that the problem may not lie in the nose or olfactory bulb itself, as previously thought.
Category: Alzheimer's & Dementia, Brain Health, Body & Mind
Tags: DZNE, Ludwig-Maximilians-Universität Munich, Alzheimer's disease, Smell, Dementia, Diagnosis, Axon Automotive, neurons, Neuroscience
Following decades of limited treatment options, people living with fibromyalgia will soon have access to a novel therapy designed to tackle the condition’s most elusive symptom: Poor-quality sleep. The US Food and Drug Administration (FDA) has just approved Tonmya, a non-opioid, under-the-tongue bedtime treatment for fibromyalgia in adults, which is expected to be widely available within months. It’s the first drug approved for this complex and debilitating condition in more than 15 years.
Category: Chronic Pain, Illnesses and conditions, Body & Mind
Tags: Pain, Chronic pain, fibromyalgia, Drug development, clinical trials, Sleep
Having hypersensitive teeth can be quite the hassle, making it painful to consume hot, cold, sweet and/or acidic foods and beverages. Tiny new "robots" are help to help, by permanently plugging tunnels in the teeth for less discomfort.
Category: Medical Devices, Medical Innovations, Body & Mind
Tags: Dental, Teeth, Treatment, Nanotechnology
The US Navy's secretive F/A-XX sixth-generation fighter plane is a bit less secret after program competitor Northrop Grumman unveiled a new concept image of its version of the carrier-based warplane, giving us a few design clues.
Category: Military, Technology
Tags: Northrop Grumman, Fighter, Aircraft
