sandro

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I'm probably late to the party but did you see that if you're in a dark room in live video preview there's a clear shift in sensitivity while going from 2000 ISO to 2500? It's like something kicks in and you're magically seeing the shadows. It's definitely too high be a 1/3 stop increment. Could that be a sign of NR? 

Do you guys have the same behavior?

Well at least we know the cpu can handle saving 60p 4K :D

We should make a first post summary cause I'm so confused... I lost track who is who and what are the difference between hacks.

1 hour ago, SR said:

You guys are my heroes. When I grow up, I wanna be just like you guys.

How old are you then? :P

Do you think this video was shot with the A7S?

3 minutes ago, kidzrevil said:

@sandro lol theres no way a bitrate hack can turn this camera into a low light camera. Not happening

Well I just hope for an acceptable 3200ISO...if what you're saying it's true..

12 hours ago, kidzrevil said:

I put the NR theory to the test.

my theory is the -10 sharpness is actually smudging out the detail creating the NR look. You guys can test it out yourself  but I am using -5 sharpness now and the image is...incredible.

Great footage, the ultimate test is high ISO...

1 hour ago, Marco Tecno said:

Wow the wonderful Jedi Otto+kinoseed made TBBAF a reality for nx1! This is huge for stills.

Can you explain?

2 hours ago, M Carter said:

Would also explain not seeing the shift with a non-samsung zoom on the camera, if the camera - even on manual - is adjusting exposure (or adjusting the iris??) due to data it's getting from the lens. Seems odd to me, but the NX1 is a very computer-heavy camera.

This subject gets weirder by the page...

I never tried zooming with a non Samsung lens since I don't have one but I don't see why it would do it...

33 minutes ago, MountneerMan said:

Ok this is my theory and it is jut a theory at this point because I cannot find any information on the internet to confirm OR disprove it.

 

Because f-stop = focal length / diameter of the entrance pupil as you zoom the lens the lens needs to change the iris to keep the same f-stop.

Quote from the Wikipedia page on f-number https://en.wikipedia.org/wiki/F-number

So assuming you have a 100-200 f4 zoom lens (fully electronic) and you were at 100mm and f/4 then you quickly zoomed to 200mm. the lens would need to detect the new focal length then calculate the diameter of the entrance pupil then adjust accordingly. The few milisec delay is just the camera calculating the then adjusting according.

 

Can someone please confirm or disprove this theory because I am starting to get frustrated with the lack of information on the internet about this. 

That would explain it.

Still doesn't explain why on manual the shift is for 1 second only.

18 hours ago, tugela said:

If everything is on manual, including gain, then zooming out will increase the amount of light on the sensor and increase overall exposure. Converse for zooming in. The video clip apparently has gain on auto, but the response to changes in exposure is not instantaneous, which is why the exposure changes like that. If he zoomed more slowly then you would not notice it.

But shouldn't that increase stay the same? Instead with the Samsung lens I used it goes back to "normal" after a moment. 

Does.it really prevent current hacking?

Is it possibile to see this NR difference between nx500 and nx1 somehow on the same scene?I didn't spot this difference.

3 minutes ago, kidzrevil said:

@sandro nx1 video is terrible in low light ! I hate going above 800

yeah but that it's supposed to be without NR... I'm starting to wonder if Samsung used that aggressive NR for a good reason...

50 minutes ago, SMGJohn said:

From what I have read early on was that 4k is upscaled 2160p and cropped in-camera, this was made from the conclusion that it lacks sharpness and had more aliasing than UHD. 

Whether this really is the case is debatable because I have no idea how it really works, it could be true line skipping for all I know. 

When I shoot 2160p or 4k in NX500 I get fine noise grain like in 1440p mode, its just smaller grain which is expected duo to higher resolution. Why is this? I use Kino's Mod Pack 1.62m, was this a standard feature on the NX500 before the hack? I am too lazy to uninstall and reinstall on my vacation just to check it, can any NX500 owner confirm with me if this was the case? 1080p mode has the ugly NR as we know it, hurts me everytime i look at that blue swirling death atoms on high ISO videos shot from NX1.

LEFT - 1440p mode from NX500 (140mbps) | RIGHT - 2160p mode from NX500 (160mbps)

What ISO? But seriously if this is below 6400 the NX1 really sucks in low light... nothing NR off can solve...

1 hour ago, gsenroc said:

Electronic aperture is not the cause, optical design is. Try EF lenses with constant aperture.

So its the lenses.

3 minutes ago, tugela said:

Kidzrevil mentioned seeing similar things with his Sigma zoom, which presumably would not be operated electronically.

I think it is just a function of the rapid change in the field of view (with consequent exposure change) and the time it takes for metering to adjust to gain to a different level to compensate.

IMO you will see it with any camera if gain correction is not instantaneous.

how can it be if it happens even when everything is all manual? If doesn't have to adjust to anything. 

I believe it's a design of these electronically controlled lenses. It's disappointing it happens with a S lens...

I don't think hdds configuration makes that much of difference. Yes you can get less jumps between different clips if positioned distant on the HDD because it needs to seek on the platters. SSD removes that problem. BUT I don't think you will humanly notice any difference. For these applications where the CPU is always the limit hdd speed is negligible considerand that most reach 100MB/s at least.

My 18-200 does the same, if I set the aperture to 6.3 while zooming out it sightly opens and then closes down to 6.3. Annoying and not acceptable for "video" lens.

http://***URL removed***/forums/thread/4001686 330Mbit hack. I don't see any difference for 3200 though... (NR wise)

@kidzrevil I'm confused, if I stay at 150-160Mbit do these problem occur also? I mean freezes and stuff.

11 hours ago, shanebrutal said:

Yeah try DIS with OIS on, it's very smooth on the 16-50 S. Tripod like if you hold still. I personally wouldnt use DIS without ois turned on if the lens supports it.

 

But I'm a fan of DIS turned on with vintage adapted glass too.

How much is the focal length multiplier with DIS on?

I wish the higher bitrate would also allow a better low light performance. At least a ISO3200 without those horrible lines.