AUTHOR SUBJECT: 4K camera choice
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Posted: 7/18/2016 5:34:13 PM
As much as it's not necessary to shoot an Indie film in 4K, it's also not smart to not consider it... in my opinion.  It's just a matter of time before HD is completely replaced by 4K.  Anyway, I'm going with 4K or, as it seems to be called all over the net UHD4K (ultra hidef 4K).  I don't know if there's a difference between 4K and UHD4k but right now it doesn't matter.  I've already made my decision.  I'm going with a mirrorless DSLR that shoots UHD4K.  The Panasonic DMC-G7K, otherwise known as the LUMIX G... I won't bore you with specs that  you can easily find on-line yourself.  I'll just say I chose the camera after comparing it on B&H photo to other 4K cameras and also after reading the reviews posted by other customers.  I really like this camera.  It shoots 4K but it also shoots HD at a variety of frame rates too.  The price was right and the sample images and video I found really sold me.  Now that I have the camera and have run my own tests, I'm not sorry I chose it..  I don't really care about whether or not the sound is any good at this point because I am shooting double system sound.  My mic goes into a stand alone digital recorder..

Check out the LUMIX G from Panasonic!

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Posted: 7/21/2016 12:11:39 PM

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Posted: 7/21/2016 6:29:45 PM
I did some checking what what I fould is this; UHD is basically the consumer display standard and a broadcast standard.  4K is a professional production and cinema standard.  Size wise, there isn't too much difference. 4K is 4096 x 2160 pixels which gives a screen ration of 1.9:1  while UHD is 3840 x 2160 pixels wich gives a screen ratio of 1.78:1.  Some of the difference between the 2 also has to do with Bitrate and color depth.  4K is suppose to use JPEG2000 compression and have a bit rate up to 250Mbps with 12 bit 4:4:4 color depth.  I don't have all the specs for UHD but my camera has a bit rate of 100Mbps  while some of the other UHD cameras I looked at only had 75Mbps bit rate.

I discovered that the majority of the "4K"  TVs on the market are actually UHD.  I don't know why or how they can get away with it but the name UHD and 4K are being used interchangably by tv marketers.  Some call it 4K. Some call it UHD 4K but the bottom line is that it IS NOT 4K.  It's close but what I've found out, 4K us pretty much what the theaters use. TV manufacturers and Streaming video services are selling UHD..

So, as far as my camera and the movie I'm making.. I"m ok with this information. UHD and "HD" monitors (Which are really UHD monitors) are made for each other...

Mike Conway
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Posted: 7/22/2016 12:44:27 AM
 The Panasonic DSLRs look impressive.  I've been happy with their DVX and HVX cameras and want to eventually transition to a 4K camera.  I've had my eye on the Sony A7S II, which I like for it's low light capability..  I don't actually have a desire or the processing hardware to shoot a whole movie in 4K (or UHD), but I would like to have that resolution for FX and greenscreen shots.

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Posted: 7/22/2016 6:05:43 AM
Exactly! Effects shots and greenscreen can absolutely benefit from the added resolution even if your movie is HD... My hardware doesn't have enough muscle for 4K either but I do have enough storage space. I'm going to do an offline edit at 1080 or 720.

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Posted: 8/1/2016 8:30:25 PM
I ran some 4k footage through Premiere pro CC installed on my 7 year old system and I couldn't believe it.  It played in full 24 fps!  It was a little stuttery at first but played smooth after a few seconds.. After rendering the timeline, it was smooth as silk, even when quickly scrolling through a scene... I really like this camera.. Because a lot of my shots will be composited with CGI, I'll have to process out the lens distortion for each shot but that doesn't bother me a bit.  I have to remember that I'm not shooting with a RED and I don't have expensive lenses. The distortion is minor but you can feel it when panning. Actually, it's a good idea to always process out any amount of lens distortion no matter how good the lenses are.  I can deal with a little extra work in post..

Remember the map shot I did for you, Marius?  There was a lot of lens distortion that I had to get rid of otherwise I would not have been able to finish the composition.

How do you get rid of lens distortion? Well, if you know your hardware you can simply enter the values in your compositing node that handles lens distortion and it will do the rest.  If you don't know or if the lens isn't that great, you can shoot a frame of some sort of graph paper with straight horizontal and vertical lines.  Bring that image into your compositing program then, using the lens distortion node, adjust out the distortion until the lines all appear nice and straight..

Mike Conway
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Posted: 8/3/2016 5:37:46 AM
I was editing Canon GH4 footage for a client.  In Premiere, I was able to play the 4K alright, but adding a key filter and then color correction turned into a bit of an ordeal.  Reminded me of the long rendering times of yore.
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Posted: 8/5/2016 1:11:59 AM

Johnny Wu
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Posted: 8/7/2016 5:44:26 AM
We shoot everything in 4K since 2015. A lot of benefit especially when you are still showing it in 1080, the ability to crop/punch in and make it look like there is two cameras filming. I currently editing with cs6 and have no problem with any of the c4k or uhd files. It edits natively. If you have an I7 computer you should be ok. Here's the latest episode of our fan film. This one also have a lot of green screen. All recorded internally to the gh4s. https://youtu.be/nXloCUR7il8

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Posted: 8/7/2016 8:18:40 AM
Nice work, Johnny!

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