Sobre os arquivos RAW (NEF) da Z9: 14 bit:
- lossless (compressão sem perdas)
- compressão high-efficiency*
- compressão high-efficiency
Não existe a opção de RAW 12 bits.
High-Efficiency RAW. 1/3 smaller.
New RAW format retains the same high image quality, dynamic range and flexibility as conventional RAW files with approximately 1/3 smaller file size. Speed up your workflow.
fonte:
https://www.nikonusa.com/en/nikon-products/product/mirrorless-cameras/z-9.html#tab-ProductDetail-ProductTabs-OverviewNotem a logo da IntoPIX na imagem.
https://www.intopix.com/tico-rawThom Hogam já fez uma ressalva com relação a isso:
What does RAW (High Efficiency) mean? Is this another name for Compressed NEF, or is there a new compression scheme in play? (Early indicators is that it's a new compression scheme, which might be licensed TICO-raw.
New I'm starting to wonder, though, about the use of the words "high efficiency." The implication is that this might be another HEIF—no, not HEIC, which is a form of HEIF—format, which means it's a standardized wrapper file, much like TIFF-EP is to NEF. HEIF stands for High Efficiency Image File Format. But we still don't know the form of the data inside and how that is producing smaller files.)
fonte:
https://www.zsystemuser.com/z-mount-cameras/z-camera-articles/the-unanswered-z9-questions.htmlSegundo Hogam, temos 2 possibilidades:
1. Os novos formatos são licenciados pela IntoPIX e são TICO RAW
2. São algum tipo de formato
HEIF (
High
Efficiency
Image
File)
Informações sobre o TICO RAW:
TICO RAW is the new RAW
Gain in Efficiency, improve your imaging workflows
- Reduce bandwidth and power consumption to process more pixels from the sensor.
- Handle higher resolution, high frame rate and high dynamic range easily : to capture to record, to transmit, to edit, to analyze.
- Reduce the bandwidth of memory during the ISP process and RAW data analysis.
- Get the lowest latency ("pixel-line") to transmit RAW data over your wired / wireless network, infrastructures, interfaces.
- Efficiently decrease the stored RAW image data on the storage media (TICO-RAW is the new RAW at the size of a regular JPEG file).
- Increase the editing, rendering, analytics speed and while retaining the sensor data needed for a complete control of the RAW processing pipeline.
Bom, mas isso acima pode ser considerado bla bla bla de marketing.
Vamos a alguns detalhes técnicos:
Imagem/video
Color format
- CFA (color-filter-array):RAW data , Bayer data (RGGB, RCCB, ...) (optional monochrome and 4:2:2 mode)
- Bit depth: 8 / 10 / 12 / 16 bits sensors
- Resolution: Any up to 200 Mpixels ( 50.000x40.000 pixels)
-Frame rates: Any (depending on ASIC / FPGA or CPU/GPU processor configuration)
Processamento
-Quality: Mathematically lossless / Near-lossless / visually lossless / lossy down to 1 bit per pixel (bpp)
- Rate control: Constant Bit Rate (CBR) operation (or Constant Quality mode), adjustable from ~2:1 down to 20:1 (0,5bpp)
- Latency: (Sub-) intra-frame: down to 0.1 millisecond
- Proxy option: Downscaler in decoder for fast analysis, raw proxy viewing and editing
Com as informações acima é possível especular que (minha opinião):
- High Efficiency+ seja Near-lossless
- High Efficiency seja visually lossless ou lossy
Tamanho dos arquivos:
55MB Lossless raw
33MB High Efficiency Raw Star
22MB High Efficiency Raw
24MB JPEG Large Fine.
E porque isso tudo acima é importante?
Já temos uma discussão gigantesca pela internet sobre a capacidade do buffer da Z9. Aqui mesmo nesse tópico já tem alguns vídeos mostrando um pouco dessa questão. Além disso o desempenho é diferente entre marcas e modelos de cartão CFexpress tipo B.
De acordo com a documentação da Nikon temos:
Keep your finger down. 1,000-image buffer capacity.
With a seemingly bottomless buffer, the Z 9 shoots continuously for more than 1,000 frames at 20 fps* as full resolution High-Efficiency RAW or JPEG (L) fine files.
*When using the recommended memory card: ProGrade Digital CFexpress™ Type B 2.0 Cobalt 1700R.
fonte:
https://www.nikonusa.com/en/nikon-products/product/mirrorless-cameras/z-9.html#tab-ProductDetail-ProductTabs-OverviewO primeiro teste que o Matt Grande fez, veja aqui:
https://forum.mundofotografico.com.br/index.php/topic,140644.msg1472466.html#msg1472466Ele conseguiu 1899 fotos usando o formato High Efficiency. Com o High Efficiency* foram 550 no buffer.
Depois ele fez um outro testes, mais completo, envolvendo os 3 formatos e diferentes cartões. Veja aqui:
https://forum.mundofotografico.com.br/index.php/topic,140644.msg1472605.html#msg1472605Mas o melhor teste, na minha opinião, foi o do Ricci. Veja aqui:
https://forum.mundofotografico.com.br/index.php/topic,140644.msg1472518.html#msg1472518teste com 20 FPS, notem a diferença nos resultados.
Com o cartão CFexpress Delkin Black 1440 MB/s
loss-less: 81
High+: 1100+
High: 3000+
Lexar 1000 MB/s
loss-less: 61
High+: 182
High: 1000+
Bom, coloco mais informações a medida que for entendo melhor a situação.
Espaço Nikon