Re: Official: Sony A7 and A7R Fullframe Mirrorless
miguel_13 wrote:
Definitely 5 or 6. This is the identical batt used in the NEX6/7, and its not particularly impressive in service there. 1080mAh? seriously?
The power pack is actually worse than it appears.
The NPFW50 is a single cell pack. 3.7V nominal * 1.080 Ah = 3.996 Watt hours of power.
Take a typical DSLR pack like the 1900 mAh ENEL15 for D800; these are two cell packs, wired in series =
7.2V nominal * 1.9Ah = 13.68 Watt hours of power. Some of that power will be given up as voltage regulator losses but there are sufficient other benefits in putting two cells in series to warrant taking on efficiency losses.
Of course there is one big downside to larger, two-cell packs: size, and for light cameras, weight.
Along with a crowd of others, I had an opportunity to handle the cameras today and I can see why Sony would opt to use a smaller pack; the cameras really are quite small. Probably the size and portability benefits are worth the trade off and minor hassle of having to pack along a few spare packs.
Incidentally the somewhat ungainly looking accessory grip is very light and comfortable. It takes two packs.
Nov 08, 2013 at 01:22 AM
Previous versions of michaelwatkins's message #11919297 « Official: Sony A7 and A7R Fullframe Mirrorless »
