Quote:
Originally Posted by pluto
Not just video, it's still the low light king for stills too. I've hardly ever used the video on mine.
Also the 4k video thing is a bit misleading - it can output 4k video through hdmi to an external recorder but 1080 60p is the max it will write to the SD.
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Sony seems to have solved that issue now with the A7Rii as it records 4K video to internal SD card.
A7Sii, you would assume they will release one at some point but its a risk they may not at all as A7Rii seems to do everything A7s did except ISO50,000 reasonably cleanly.
Don't forget though these high ISOs are somewhat academic as for astroimaging I doubt there is a gain using such high ISO's. Its always better to use a lower ISO with higher dynamic range and longer exposure than high ISO. The amount of light is the amount of light and whacking up the ISO is the same as whacking up the volume in your stereo. It starts to distort after a while.
Dynamic Range falls as ISO goes up. Highest Dynamic Range is always at the lowest ISO. When you look at most DSLR astro images the first casualty is the colours of the stars. That is a lack of dynamic range.
Greg.