Sony Alpha 7R V - with 8K video and 4K downsampling
[16:57 Wed,26.October 2022 by Rudi Schmidts]
Sony today (not entirely unexpectedly) introduced a new Alpha camera - namely the Alpha 7R V. As the addendum "R" already indicates, this is a model with a particularly high-resolution 61 megapixel sensor, which usually reduces its suitability for filming somewhat. Nevertheless, the Sony Alpha 7R V again offers some video functionality, which usually "rubs off" on low-resolution cameras in the near future.
The Sony Alpha 7R V
So there's 8K 24/25p video, 4K video oversampling of 6.2K without binning, MPEG-H HEVC/H.265 encoding among other things, intra-recording and 4:2:2 10-bit recording. However, not everything together, if you look at the very small footnotes of the press release. The following restrictions apply in any case:
Anyone filming in 8K can only do so at 24/25p with a 1:1 sensor readout, resulting in a KB crop factor of 1.2. Slow motion and fast motion are not available when recording XAVC HS 8K films. Recording here is at 7,680 x 4,320 pixels in 4:2:0, 10 bit at up to 400 Mbps.
10 bit 4:2:2 is only available for 4K recording up to 60p with a maximum of 600Mbit/s (in XAVC S-I 4K). However, full oversampling without binning for high quality 4K recording only works with a 6.2K readout on an S35/APS-C sensor surface and, according to the footnote, that too only at 24-30p with a KB crop factor of about 1.5.
The Sony Alpha 7R V
On the other hand, Sony is not stingy with the image profiles for professional use and unlocks the entire available range: S-Cinetone, Cine1-4, ITU709, ITU709[800%], S-Log2, S-Log3, HLG and HLG1-3 are on board.
If you don't need 8K, you should still be able to get higher frame rates in 4K with at least as good quality with a camera like the much cheaper FX30, which can also do 6.2K-S35 downsampling - and even up to 60p.
Since the camera is also said to cost 4,500.00 euros, it is likely to be primarily of interest to photographers rather than filmmakers. Which is why we would like to refer interested readers to the relevant photo websites...
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