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amanieux

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Everything posted by amanieux

  1. what a mystery, can you at least say if X is a camera body or something else ?
  2. hello will you try comparing external 1080p 4:2:2 10 bits recording on your blackmagic hyperdeck shuttle recodrer to the internal 1080p 4:2:0 8bits and intenal 4k 4:2:0 8bits downsampled to 1080p (4:4:4 10bits equivalent) in post ? thanks
  3. seems promising for low light, will you update your gh3/3dmark3/7d/bmpcc low light video comparison (http://www.eoshd.com/content/11350/depth-test-5d-mark-iii-7d-raw-vs-blackmagic-pocket-vs-gh3) with bmpcc and this new adapter x0.58 or the f0.23 gain on the sigma f1.8 (from previous x0.71 adapter) will barely be noticeable ? thank you
  4. hello eveyone i always read that smaller sensor has poor low light performance compared to bigger sensor (assuming sensor technology is of the same generation) which seems logical because the surface to collect light energy is smaller can someone explain why in this test the low light performance of the pocket camera with a 12.48x7.02mm sensor on a f1.8*0.71= f1.28 is better (less noise) than the 5d mark3 on a f1.4 lens (almost similar aperture) but 10x smaller sensor ? the ratio of sensor surface is 36*24/(12.4*7) = 9.9 should not the image on the 5d mark 3 be 3.2 stop brighter (ln2(9.9)-(1.4-1.28)) and thus have less noise as explained here (http://www.clarkvision.com/articles/does.pixel.size.matter/#Introduction) i also read that it is pixel size that determines the s/n ratio and not the sensor size . so pocket cinema camera has a pixel width of 12.48mm/1920 = 6.5um and 5dmark3 has a pixel width of 36mm/5760=6.2um so it should have similar noise ratio. but then if the 5dmak3 is multisampled by a factor of 3 ( 5760/1920) on each axis,when we average the 9 pixels, the noise level must be dived by 9. so why does this test shows bmpcc in low light with less noise than the 5dmk3 ? was there a noise reduction done in post process for the bmpcc and not for the 5dmk3 ? thank you
  5. excuse me to ask a candid question but can the DOF in the background be identical on both camera if you also used the 50mm on the BMCC but moved the BMCC further back to match the field of view of the 5dmk3 with the 50mm ? 
  6. and the cinematic is strange when she walks as if there were some frames dropped
  7. if "lower resolution" means it skips 3 pixels in both directions then only 11.1% of the initial information is used :(
  8. there are 2 way of doing this pixel skipping (ugly) or downsampling (very nice on this 22mpixel sensor as it is a 9 pixels to 1 pixel dowsampling ratio) i hope it is not pixel skipping because it would mean only 1/9 of the pixels are used to produce the final image :(
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