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Hasselblad’s crazy 400-megapixel camera does have a purpose

If you judge cameras by megapixels and dollar signs, then Hasselblad just introduced the ultimate model. The H6D-400c can shoot 400-megapixel photos and will cost you $48,000, the price of a well-equipped Tesla Model 3. It does so by combining up to six different exposures from its 100-megapixel, medium-format 53.4 X 40.0mm sensor in a process it calls “Multi Shot.” Each image is shifted by a pixel, creating a much-higher resolution image, similar to how Pixel Shift works on Sony’s A7R III mirrorless camera.

Photos are captured at a true 16-bit depth. You can either combine six images to create a higher-resolution 400-megapixel image (23,200 x 17,400, at 2.4GB in size), or create an enhanced 100-megapixel photo with more accurate colors. The images are snapped in rapid succession, but your subject needs to stay relatively still.

400 megapixels may seem like pixel-peeping overkill, but there is a point to this. For digital archivists who log art, insects and other specimens for museums, or macro photographers, more detail is always a better thing. As an example of that, Hasselblad shows just how far you can zoom in on an insect snapped by Göran Liljeberg, a macro photographer and Swedish Museum of Natural History committee member. Professional landscape, art or fashion photographers can also benefit from more resolution to aid in photo post-processing.

Hasselblad, not known for its technical prowess, finally caught up with other camera makers with the release of the X1D. The H6D-400C continues that trend, with USB 3.0 Type C for speedy data transfers, 30 fps live view, dual memory cards (CFast 2.0 and SD) and WiFi that, along with the Phocus Mobile iOS app, gives you speedy wireless studio image previews.

The H6D-400C can even do 4K video recording in Hasselblad’s proprietary RAW video format. That would give your films an incredibly unique look, considering the depth of field and bokeh potential from some a massive sensor. Just remember that the $48,000 price tag (£43,500) doesn’t include any lenses.

Via: Engadget Chinese

Source: Hasselblad

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Existing EV batteries could be recharged five times faster

Lithium-ion batteries have massively improved in the last half-decade, but there are still issues. The biggest, especially for EVs, is that charging takes too long to make them as useful as regular cars for highway driving. Researchers from the University of Warwick (WMG) have discovered that we may not need to be so patient, though. They developed a new type of sensor that measures internal battery temperatures and discovered that we can probably recharge them up to five times quicker without overheating problems.

Overcharging a lithium-ion battery anode can lead to lithium buildup, which can break through a battery's separator, create a short-circuit and cause catastrophic failure. That can cause the electrolyte to emit gases and literally blow up the battery, so manufacturers impose strict charging power limits to prevent it.

Those limits are based on hard-to-measure internal temperatures, however, which is where the WMG probe comes in. It's a fiber optic sensor, protected by a chemical layer that can be directly inserted into a lithium-ion cell to give highly precise thermal measurements without affecting its performance.

The team tested the sensor on standard 18650 li-ion cells, used in Tesla's Model S and X, among other EVs. They discovered that they can be charged five times faster than previously thought without damage. Such speeds would reduce battery life, but if used judiciously, the impact would be minimized, said lead researcher Dr. Tazdin Amietszajew.

Faster charging as always comes at the expense of overall battery life but many consumers would welcome the ability to charge a vehicle battery quickly when short journey times are required and then to switch to standard charge periods at other times.

There's still some work to do. While the research showed the li-ion cells can support higher temperatures, EVs and charging systems would have to have "precisely tuned profiles/limits" to prevent problems. It's also not clear how battery makers would install the sensors in the cells.

Nevertheless, it shows a lot of promise for much faster charging speeds in the near future. Even if battery capacities stayed the same, charging in 5 minutes instead of 25 could flip a lot of drivers over to the green side.

Via: Clean Technica

Source: University of Warwick

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