The SD Association has announced an extension to the format that will allow SDHC and SDXC cards with transfer rates of up to 300 MB/s - three times faster than the theoretical maximum of the UHS-I cards that are starting to appear and sixteen times quicker than conventional cards. The as yet unnamed standard will use a second row of connection pins located behind the existing ones to allow the greater transfer rates. The association says the cards will be defined by the SD 4.0 specification expected in early 2011 and will be backwards-compatible with existing SD, SDHC and SDXC devices, albeit without the speed benefits.

Just posted: our updated review of Sony's SLT A55. Following Adobe's launch of RAW support for the SLT cameras, we've taken an in-depth look at the noise, dynamic range and image quality of the camera's RAW output. We've also conducted tests and sifted-through our 1500+ real-world images to address the much-discussed 'ghosting' phenomenon caused by the A55's innovative semi-transmissive mirror design. With this work completed we're now able to round-off the review by giving the camera a final score.

Toshiba has announced what it claims will be the world's fastest SDHC UHS-I and the world's first microSDHC UHS-I compliant memory cards. To be available in 32GB, 16GB and 8GB capacities, the SDHC cards will offer read and write speeds of up to 95MB/s and 80MB/s respectively. The microSDHC cards will be available in 4GB, 8GB and 16GB capacities with read and write speeds of up to 45MB/s and 20MB/s. The company says mass production of the SDHC UHS-I cards and sample shipments of the new microSDHC UHS-I cards will begin from November 2010.

Just posted! Our Sony SLT-A33 preview samples gallery. We've already treated the A33's bigger brother, the SLT-A55, to an in-depth review. Now we've had a chance to get out and shoot with the slightly lower-spec A33 as well. It lacks the GPS module of the A55 and comes with a slightly lower sensor resolution but is otherwise almost identical to Sony's top-of-the-range translucent mirror model. Have a look through our gallery and see for yourself what the Sony SLT-A33 has to offer in terms of image quality.

Datacolor has announced the SpyderLensCal focus calibrator. The device allows photographers to measure the AF performance of their camera/lens combinations. On DSLRs with a micro-adjustment feature, this tool can be used to help determine the best values to set in the camera's custom settings menu to correct front or back focus. SpyderLensCal will be available from September 6, 2010 at a suggested retail price of $59.