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Member Since 25 Jun 2011
Offline Last Active Yesterday, 09:43 PM

Posts I've Made

In Topic: 4K downscale vs 1080p

07 October 2015 - 03:26 AM

Samsung doesn't have a housing. I don't see Olympus at all on that table. And the Nikon have nothing in the compatible atomos product??

In Topic: Leak Sentinel V4 and Vacuum Valves

07 October 2015 - 01:14 AM

You can upgrade for €50 and get the new circuit board. The on / off feature is the best addition and yes you need a few strokes more as the sensor is outside the housing so temperature compensation is not perfect

In Topic: 4K downscale vs 1080p

07 October 2015 - 12:59 AM

I can't see any other camera that is not a camcorder and the 5D actually is with magic lantern not atomos

In Topic: 4K downscale vs 1080p

06 October 2015 - 11:57 PM

My choice would be shoot and edit in 4K and deliver in 1080.


With FCPX I would also transcode to ProRes, so the system isn't having to transcode on the fly. Working with the higher resolution images will provide more scope for color correction, stabalisation etc, plus noise reduction applied to a 4k file and then down sample really does clean up the noise.


The only downside to all this is that we (at the moment) lack 4k 60fps and we have to live with sensor crops so taking away some of the wide angle benefits of our lenses.

I looked in FCPX and it does not have options in the scale function to determine how it will be performed. I understand the Prores part to make changes however I still don't believe it affects scaling.

It would be different if the footage had been captured in prores to start with at higher bitrate and then certainly there would have been less artifacts and more detail however this only applies if you have an external recorder.

Other than the Canon 5D, Panasonic GH4 and Sony RX100 and A7 am not aware of other devices that can use an external recorder?

In Topic: 4K downscale vs 1080p

06 October 2015 - 03:19 AM

it may




I think this is why you don't see any benefit from downscaling the 4K to 1080p - as the 4K mode from the LX100 is already performing some pixel squeezing.


I think its only the GH4 that is taking a pure 1:1 4k centre crop from the sensor.


The GX8 sensor has a greater crop (due to being 20MP) in 4K mode - and I think (from cameralabs review) its 4K mode is also not a pure 1:1 pixel reading


I wish they would give use the options

1. Use full width of sensor for 4k - but loose quality

2. Use 1:1 centre pixels - but lose some wide angle

i think it has also to do with the fact that the LX100 has limited resolution


The GH4 resolves 2400-2500 lpph the LX100 only 2150 so in effect it does not even resolve 4K at the start


The 1:1 pixel mode is very useful for macro on my GX7 it gives an immediate 2.4x zoom and it looks very clean