WattUp combats this problem with a type of beam-forming technology. That Bluetooth connection is used to focus a tight cone of electromagnetic waves on the target, and it can even track the device and recalibrate as needed. A standard Qi wireless charger is about 90% efficient, but Energous claims it can hit 70% at much greater distances.
Flash memory cards for digital cameras are now absurdly cheap. A 64GB SD card can be bought online for around Â£30. Thatâs enough space to store 5,000 raw files produced by a typical DSLR â or upwards of 30,000 JPEGs. These cut-price cards come with a caveat, though.lash memory cards for digital cameras are now absurdly cheap. A 64GB SD card can be bought online for around Â£30. Thatâs enough space to store 5,000 raw files produced by a typical DSLR â or upwards of 30,000 JPEGs. These cut-price cards come with a caveat, though.
1 Check the compatibility with your camera and ensure that the memory card is a good fit for you and your camera. 2  Remember, all SanDisk SD and microSD cards are water-proof, temperature-proof, shock-proof, and X-Ray proof. The Extremes also record Class 10 video, which is Full HD.For the photo hobbyist who is simply looking to enjoy their DSLR, consider the SanDisk Ultra memory cards. 2  After you choose what type of card you wish to obtain, you must then decide what capacity you need.