The place for questions about shooting with Blackmagic Cameras.
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John Waldorff

  • Posts: 182
  • Joined: Wed Aug 22, 2012 10:19 pm

Re: Afterglow

PostThu Oct 04, 2012 10:49 pm

She looks lovely that way.
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John Tissavary

  • Posts: 144
  • Joined: Mon Sep 10, 2012 12:07 am
  • Location: Vancouver, BC

Re: Afterglow

PostTue Oct 09, 2012 5:09 pm

Thanks John! Hopefully cameras will be shipping soon and I'll start seeing more material shot with it.
John Tissavary
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Re: Afterglow

PostWed Oct 24, 2012 7:30 pm

Hi Brian@202020

The RAW bayered image size is 2432 x 1366 which gets debayered to 2400 x 1350. There is a slight crop to get rid of the edges of the image because when you are debayering, the very boundary of the frame will not have enough surrounding information to be accurately debayered and will need to be discarded. This is a pretty standard procedure for debayering images.

The DNG has a DefaultCropSize tag which is explained as:

Raw images often store extra pixels around the edges of the final image. These extra pixels help prevent interpolation artifacts near the edges of the final image.
DefaultCropSize specifies the size of the final image area, in raw image coordinates (i.e., before the DefaultScale has been applied).

EDIT: ..the files are indeed 2432x1366..

i got proactive and have written a small tool that can process a folder of BMCC dngs at full res. (2432x1366), and extract the raw greyscale cfa etc , and do some other stuff


Re: Afterglow

PostWed Dec 04, 2013 6:06 pm

Question! I saw this spot on vimeo and looks fantastic. Congrats! Now, does the glass choice affects the image quality a little bit? What a mean is, I'm an indy short film and music videos director, so I'm planning to buy a BMcinema 2.5k but with MFT mount, so I have better choice for lenses and faster too. I know there are tons of factors about the image quality, specially lighting a scene but... does the EF mount influenced the image on this spot because of the lens choice (beside lighting) or I shouldn't be concern about the mount as there are lot's of choices out there for the MFT mount, even PL mount I can put cooke lenses...

Thanks :mrgreen:

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