Alex Lobos

​For any of two solutions, the Inogeni converter, or the Blackmagic PCI card, wouldn't be any cheap PC solution? (battery powered or not) "Raspberry-Pi-like" or so?

​Thanks for the explaination... that sounds so mysterious to me why a 'different sensor technology' would make such a change in heat and power needed when compressing/recording pixel information. :-O and while several samrtphones already record 4K. ? About the power i wouldn't care to have a heavier battery, or several ones to change often, if i can record 4K. (my purpose is to make photos from video-frames in high-shutter speed, because of the subject moving fast and sereval reasons ( http://www.avsforum.com/forum/161-camcorders/1949529-any-cheap-4k-external-recorder-coming-sony-a7s.html )

Also... would thoses solutions record kind of 'raw' or 'compressed' on a HD? I'm quite unsure about all thoses video formats... I mean if it's 1Tb for each hour of video it's not gonna be practical to use 4K... Other question: Is it likely that Sony will come-up soon with a new version of this camera that can this time record the 4K video internally ? I'm wondering if it's better to buy this camera and wait to a cheap 4K recorder to come-up on the market, or if i should rather wait for a similar extremely sensitive camera that record 4K in candle light... but how long would we have to wait?

Thanks for the tips!

Nice. I'm also looking forward to buy this unique camera so sensitive to low light in video, to the condition that i can record 4k with it at a reasonable price... I just posted the question yesterday on dpreview: http://***URL removed***/forums/thread/3818206 Also: Could this converter record 4K from the A7S ? -> http://www.bhphotovideo.com/c/product/1073122-REG/inogeni_4k2usb3_4k_hdmi_to_usb.html (but anyway it's usb3.0 , while my MBP i7 is only usb2, damn, i would probably have to buy another computer) And also i saw this card, wondering also if it would work with the A7S but hmm, still expensive, and i don't have a desktop computer: http://www.bhphotovideo.com/c/product/1044784-REG/blackmagic_design_bdlkstudio4k_decklink_studio_4k.html thanks