Birk Kromann
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Posts posted by Birk Kromann
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These are great - have watched them so many times! Actually just bought the Hypergonar Hi-Fi 2 today as well as the Rangefinder.
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It still seems you didn't shoot correctly with A7s and with that in mind it makes a lot of sense that you see a big difference between the two. You mention that you have used the 1Dc extensively but not the A7s an that alone, to me at least, makes your statements invalid. That its backed up by a pro working for Sony too is invalid unless you can present his findings.
If you expose the A7s "correctly" (meaning not ETTR) you will get more noise because the sensor needs the extra 1 or 2 stops of light. The 1Dc on the other hand works best if you expose it "correctly" Even with this taken into consideration I still don't find it realistic that the 1Dc can be as sensitive. Unfortunately I don't have a 1Dc so I can test it for my self. -
I would love to see douglaurent compare the 1Dc to 35mm film. Lol.
Btw, when is the next part of the review coming up?
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Looking at the test on dox it seems like a photography test not a video test and from what i have seen none of the DSLR cameras do video half as good as they do low light photos in the high iso settings.
That is normally the case for bit depth and DR, but not as much for ISO - especially not with the codecs on the A7s and 1Dc. Even with a big difference between video and photo the relation between the two should still be roughly the same, right?
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the 1DC goes to ISO 204.000. the A7S only looks a bit less noisy (but still less sharp) in areas from 50-200.000 ISO, but i don't see where anyone can use footage above 12.800 professionally anyway. in the test, 1DC had c-log and a7s s-log, and it was not brought up in post. still the a7s delivers impressive lowlight quality - but it doesnt beat the 1DC. if sony would have had a lowlight technology that stands far above canon's AND sells it for 1/5 of the price, that would have been a wonder, and wonder's rarely do happen in combination of more features for less money... i simply think too few people did use the 1DC too little time, as the price is way too high. now together with the shogun this is really beautiful system, only with the lack of 4k 60p. i am sure canon will come up with 4k for the 5D4 and C300 II in 2015, the question will be: does it have 4k 60p? i fear not, that might be left for an expensive C500 II. so we might have the canon discussion for a little more time. in any event the shogun might be a product that can be used for much longer time than any of the cameras.
Being a A7s owner I find it very difficult to recognise any of what you are writing. I don't have the Shogun yet but can't imagine it would affect the ISO performance.
I know DxOMark are not always the best source of information for filmmakers but in regards to ISO I find their numbers very believable. As the 1Dc and 1Dx share the same sensor I have chosen to compare the A7s to that:
A7s score: 3702
1Dx score: 2786
http://www.dxomark.com/Cameras/Compare/Side-by-side/Sony-A7S-versus-Canon-EOS-1Dx___949_753
I don't see how one of the biggest test labs could be more than a 1000 points off, but please let me know if I have missed anything. -
I'm really curios to see if the Shogun will record 120 fps 1080p Proves from the A7s!
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A lot of GH4 fans are gonna disappointed or oppose this test~
For A7S ,it looks like awarded the gold medal,but for many other cameras , it is a death knell!
It seems that not many GH4 owners care that much for dynamic range but more about internal 4K.
It doesn't surprise me that the GH4 is barely 11 stops, looking at all the GH4 stuff available it is very apparent that the dynamic range is around 11-12 stops. -
This is very interesting:
http://***URL not allowed***/dynamic-range-sony-a7s-vs-arri-amira-canon-c300-5d-mark-iii-1dc-panasonic-gh4/
Brief summary:
Amira: 14.5A7s: 14.1
5D Mark III: 11.8
1DC: 11.7
C300: 11.4
GH4: 10.9
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from Sony : Dynamic Range extended to 15.3 stops as sensor RAW output :)
Do you have a link? -
Depends how good your colour grader is and how bad you light things.
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I think people tend to forgot DR. We can discuss this forever, but resolution and but depth isn't everything. IMHO the most difficult thing to correct/change is DR ergo is should be the highest priority. To me that gives the nicest images and is why the A7s looks so much nicer.
And that's talking from a professional point of view. -
I think 14 vs 12 stops says it all. But again, people have different opinion as to what makes an image cinematic.a7s 1.tiff
For whatever reason this A7S frame is more visually appealing than GH4 ... I don't think I am alone on this... forget specs for a moment.
And no Jason, I don't think you're missing anything. Although (how stupid it might be) this is a post with "who wins the 4K battle on paper" in the titel (and we are still commenting on it) -
After having seen the ISO comparison I've been wondering is it's fair to compare these to cameras?
To me they are to very different cameras with very different specs aimed at different people.
I would pick the A7s over the GH4 any time, but that's only because I value dynamic range, full frame sensor, ISO performance and quality photos higher than internal 4K, high bit rates, small sensor, M43 mount and small form factor.
Other persons have their own features that makes either camera suited for them. -
In regards to price, this might shed some light on a possible price (although they state in the article that it might change before the actual release)
http://www.sonyalpharumors.com/sony-a7-gets-a-provisory-price-in-uk-2500-pounds/
And a fun little ISO comparison:
http://petapixel.com/2014/04/11/sony-releases-another-insane-a7s-low-light-demo-much-will-night-vision-cost/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+PetaPixel+%28PetaPixel%29 -
Not sure - do the HDMI > HDI converters work in 4K?
See, that's what I'm unsure about. Would be great if anybody could confirm whether or not that would work.
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Isn't it possible to convert the HDMI signal to SDI and use one of the existing 4K capable recorders or am I missing something here?
To me 14 stops of dynamic range (yet to be confirmed by Sony) and amazingly good low light sensitivity is to me more important than internal 4K recording. -
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What was your workflow exactly? -
Have you had any first hand experience with an Alexa?
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And as always you're coming up with speculations and not actual facts. Nikon lobbying? Really?
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Have you seen Dexter and Wilfred?
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I completely understand what you're saying.
But when you read this article:
http://www.studiodaily.com/2013/01/nikons-d800-gets-down-and-dirty-for-dexter/
It kind of makes you wonder if there is some truth behind it. Jeff Jur even says his colourists had a hard time telling the difference when they were grading them.
Even seeing footage from both of them makes it very clear that they're is a difference. -
According to DxOMark the dynamic range of the Nikon D800 is a whopping 14.4 stops. I have no problem believing that it is not the same as the Alexa and that the Alexa's 14 stops are calculated differently.
It is interesting though that the Canon 5D Mark III only scores a mere 11.7 in the same test, making it almost a half stop less than the 6D (currently the best performing Canon DSLR in the dynamic range category) and 0.2 stops lower than the Mark II
Nikon D800:
http://www.dxomark.com/Cameras/Nikon/D800Canon 5D Mark III
http://www.dxomark.com/Cameras/Canon/EOS-5D-Mark-III
Does anybody else find this a bit peculiar? Especially since the 5D is the "go to" DSLR for filmmakers, heck I even own one my self. -
Why are they so allergic to making video cameras?
Well, because they are a photographic company with no dedicated film division. You could ask yourself the same with Arri; why are they so allergic to photo cameras?
FS: Optar Illumina Super 16mm Lens Set (As New)
In: Cameras
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Are these still for sale?