Here you’ll find basic Blackmagic camera data rates, recording times and shutter speed as angles. I have not listed data rates for all the frame rates, just for 25fps to give a rough idea.

Data Rates – Comparative data rates for Prores are given below. (Mb = Megabit, not Megabyte (MB)… there are 8 bits in a byte, so divide these numbers by 8 if you want MB/sec)

1920 x 1080 @25fps 3840 x 2160 @25fps
ProRes 422 HQ 184Mb/sec 737Mb/sec
ProRes 422 122Mb/sec 492Mb/sec
ProRes 422 LT 85Mb/sec 342Mb/sec
ProRes 422 Proxy 38Mb/sec 151Mb/sec 

Recording Times – Below you can find recording times for each camera and format.

For the Cinema Camera (RAW is 2.5K, ProRes is 1080p25):
–       480 GB SSD, recording RAW = approximately 65 minutes
–       480 GB SSD, recording ProRes 422 HQ = approximately 5.9 hours
–       480 GB SSD, recording ProRes 422 = approximately 9 hours
–       480 GB SSD, recording ProRes 422 LT = approximately 12.8 hours
–       480 GB SSD, recording ProRes 422 Proxy = approximately 28.8 hours

For the Production Camera 4K, URSA 4K, URSA Mini 4K (2160p25):
–       480 GB SSD, recording CinemaDNG RAW = approximately 35 minutes
–       480 GB SSD, recording ProRes 422 HQ = approximately 89 minutes
–       480 GB SSD, recording ProRes 422 = approximately 2.2 hours
–       480 GB SSD, recording ProRes 422 LT = approximately 3.2 hours
–       480 GB SSD, recording ProRes 422 Proxy = approximately 7.2 hours

For the Pocket Cinema Camera (1080p25):
–       64 GB card, recording RAW = approximately 15 minutes
–       64 GB card, recording ProRes 422 HQ = approximately 35-40 minutes
–       64 GB card, recording ProRes 422 = approximately 70 minutes
–       64 GB card, recording ProRes 422 LT = approximately 1.7 hours
–       64 GB card, recording ProRes 422 Proxy = approximately 3.3 hours

Native ISO – Below you can find the native ISO for each camera.

Pocket Cinema Camera – ISO 800
Cinema Camera – ISO 800
Production Camera 4K – ISO 400

Shutter Angle to Shutter Speed Conversion – Below you can find the shutter speed in 1/x sec. For example… 25 frames per second (fps) on 180 degree shutter angle = 1/50th sec shutter speed.

Shutter Speed (1/x sec) at the below frame rates (fps)
Shutter Angle (Degrees) 23.98fps 24fps 25fps 29.97fps 30fps
45 191.84 192 200 239.76 240
90 95.92 96 100 119.88 120
108 79.93 80 83.33 99.90 100
144 59.95 60 62.50 74.93 75
172.8 49.96 50 52.08 62.44 62.50
180 47.96 48 50 59.94 60
216 39.97 40 41.67 49.95 50
270 31.97 32 33.30 39.96 40
324 26.64 26.67 27.78 33.30 33.33
360 23.98 24 25 29.97 30

 

5 Comments

  1. Stephen Adams

    This article is a great resourse for the BMCC users. Great work Richard

  2. Great info! I am about confused about the issue of native iso in digital cameras. You mention 800 as the native iso with the BMPCC. If I select a lower iso, say 200, will that negatively impact the image? I’m a bit confused by the concept of being able to go lower than the native iso. Thoughts?

    • Hi Brendon, I came across a article on RedShark that explains why ISO in terms of digital sensors is in fact so misleading. It doesn’t quite answer your question, but I’ve linked to a second article that will.

      The ISO set in camera doesn’t actually change the “sensitivity” of the sensor at all, it simply defines any amplification (if set above the “native” sensitivity) or simulates a ISO lower than the native sensitivity. I would not recommend using a setting lower because it will reduce the dynamic range available in your image. Your best image will be more or less at the “native” ISO and if you are over-exposed you should either stop down aperture or use ND filters rather than a lower “ISO” in camera.

      Here’s the links.

      http://www.redsharknews.com/technology/item/1966-understanding-iso-in-digital-cameras,-it-s-not-what-you-think-it-is

      http://dpanswers.com/content/tech_iso.php

  3. Thanks for the reply. I think I understand, and I’ll be sticking to the native ISO when possible.

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.