The first SLRs had clip-on external light meters, and those meters eventually became standard components. Unfortunately with interchangeable lens cameras, the meter’s coverage only matched the standard lens and perhaps a 35mm wide-angle lens. It wasn’t through-the-lens (TTL) metering, but at least it eliminated the need to carry a separate light meter. The Topcon RE […]
MacBook Air components are officially non-user-replaceable, though third-parties do sell upgrade kits for the SSDs. The flash memory and battery are enclosed within the casing, with RAM soldered onto the motherboard. The flash memory, difficult to access, has a 128 MB cache and a mSATA connection (updated to a proprietary PCIe interface) to the motherboard.
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In the current product line, the MacBook Air sits below the performance-range of the MacBook Pro and compared to the MacBook Retina. However, its features reflect different priorities. The Air was originally released as a premium ultraportable positioned above the previous MacBook. Since then, the Air has become Apple's entry-level laptop due to the MacBook's discontinuation in 2011, as well as lowered prices on subsequent iterations.
MacBook Air is portable and light weight device made available users. Apple updated their MacBook subsequently and launched MacBook Air. MacBook air is compact, slim and more powerful than existing Mac. More powerful processor, turbo boost LED backlit widescreen display, multi-touch track pad, Intel HD graphics and many more advanced features distinguish from MacBook. For any kind of issues an error or problem-related to Apple MacBook Air Technical Support can be dealt easily under right technicians.