View Full Version : FDR AX700 vs.FDR AX100 etc.


Lou Bruno
November 13th, 2017, 07:05 AM
Has anyone found any comparisons between the 700 vs. the 100 or for that matter even the X70 vs the 80 and 90? I did an extensive You Tube search to no avail....just wondering if the upgrade is worth the expense as it relates to picture quality. Thanks to all.

Noa Put
November 13th, 2017, 07:14 AM
I think the ax100 doesn't need much improvement in image quality but it does in noise at higher iso's.

Mark Watson
November 13th, 2017, 08:53 AM
AX100 is still pretty good. The upgrade things that interest me are 120p at FHD rather than AX100's 1280x720. Improved A/F would be nice, since I get soft footage when shooting a fast moving object. Touch-screen focus and all that sounds a bit better. Personally, I am leaning towards the PXW-Z90 for my tripod camera to replace the AX100.

John McCully
November 13th, 2017, 02:30 PM
While I am also more than happy with the image quality of the AX100 I do find the LCD and EVF not bright enough when shooting 4k outdoors in full sunlight. Under these conditions I find the EVF essentially useless. Reading the specifications improvements have been made to both and if significant that alone would entice me to upgrade.

I’m also looking for a detailed in-depth review.

Cliff Totten
November 13th, 2017, 02:44 PM
The Ax100 is still a sweet camcorder today. However, the AX700 now uses Sony most current BSI 1 inch-type sensor with onboard RAM.

I noticed a significant quality improvement over the X70 when they put this sensor in the Z150. Its definetely a better sensor and the noise reduction processing took a...I dunno...3 to 6db improvement? The Z150 looks cleaner at 18db than the X70/Ax100 at 15db. Plus it seems that more detail is retained too.

I sold my X70 and pre ordered the NX80. I dont need 1080 SDI any more.

Mark Watson
November 14th, 2017, 12:42 AM
The Z90 is supposed to have HD 4:2:2 10-bit. I'm hoping the HFR 120p FHD will get this 10-bit 4:2:2 goodness. For an extra $500 I should hope to get more than a SDI jack, especially since there's a type A HDMI on all these.

Paul Anderegg
November 15th, 2017, 01:09 AM
They tend to think that anyone jacking into SDI instead of HDMI is a TV network and would have a bigger budget to splurge for a simple BNC jack!

Paul

Mark Watson
November 15th, 2017, 01:26 AM
I prefer the SDI jack for my external monitor, SmallHD DP6. Much more solid connection. Budget, what's that? Hope it hits the Japanese camera stores soon so I have one for Christmas vacation.

Doug Jensen
November 16th, 2017, 02:00 PM
The Z90 is supposed to have HD 4:2:2 10-bit. I'm hoping the HFR 120p FHD will get this 10-bit 4:2:2 goodness.

It does get it and it looks great. BTW, shooting HFR is addicting. I need an intervention.

Sony PXW-Z90 Test Footage on Vimeo

Mark Watson
November 16th, 2017, 10:56 PM
Wow! That's great news. Thanks for confirming that Doug! I think this might be the first time this feature has appeared in a handycam. Definitely will be getting a Z90. I've e-mailed Yodobashi Camera to see when it will appear on their shelves.

Paul Anderegg
November 17th, 2017, 01:19 AM
Hey Doug, just curious, would the "instant HDR" for HD shooting work well in my type of ENG shooting at night, where I have a weak LED and dark scenes with patches of intensely bright light, like spotlights or interiors of businesses? I have a preset effect in FCPX that drops my highlights -8 just to account for those specific clips, but if this can be used as a "super knee" that would work great! :)

Paul

Doug Jensen
November 17th, 2017, 10:32 AM
In my opinion, HLG is strictly for live output or broadcasting to an HLG capable monitor or network. HLG offers no advantages for a processing in post and I think I can safely say that I will never shoot with that profile. Even for "ilve" output I don't really believe that you can output for HDR and SDR at the same time. I am not drinking that Kool-aid yet.. You may want to give S-LOG2 a try instead if you want more dynamic range and avoid the evils of knee.

Paul Anderegg
November 17th, 2017, 11:09 AM
The consensus I have always read online is that S-log is not for shooting in darkness.

Paul

Doug Jensen
November 17th, 2017, 11:35 AM
I don't shy away from S-LOG in darkness or any other kind of light. But, if you're not going to have time to grade in Resolve then I agree with you that a good low-light scene file using one of the regular REC709 gammas would be a better choice. But I cannot say which one would be best for low light because I haven't tested them in low light, but it certainly would not be any of the HLG gammas.

Cliff Totten
November 17th, 2017, 12:56 PM
The consensus I have always read online is that S-log is not for shooting in darkness.

Paul

Its important to note that SLOG "suppresses" brightness. In low light, we are often trying to bend over bavkwards to take in a much light as possible to get the brighness on your scopes where you'd like them.

Slog is going to fight you all the way. Its going to compress that brightness at a certain ratio. (For every stop of light comming in, only a fraction of that stop will reflect on your scope when Slog is done with it)

So....just understand that Slog's roll is to compress the very thing you might want strong at night.

Whatever camera you use.....Slog or Vlog. Avoid added gain at all costs. Gain is not light actual "exposure". Gain has NOTHING to do with real "exposure". In fact....the sensor "exposure" process is completed with shutter speed and iris. This "exposed" image is sent down the pipe for gain to be added if necessary.

In other words..."gain" is a "post processing" addition that is applied to an image after actual "light exposure" was completed. Adding gain will just add noise and potentially reduce your dynamic range.

I have shot fireworks with laser's and intense flames with large LED images in Slog with great sucess. Although this is a night time event, its also loaded with enormous dynamic range.

If what you are shooting at night is a 7 stop or less scene, than stay with rec709-ish profiles. No need to capture 6 stops scene in a 14 stop curve. That would be a waste and wind up hurting you anyway.

Paul Anderegg
November 17th, 2017, 01:14 PM
Cliff, I understand S-log compresses highlights, and my understanding is that it does this by doing away with a certain amount of shadow data. I don't want to make my highlights brighter, I want to make my shadows brighter without shoving my REC709 highlights into 150% IRE.

Below is a typical example of a bright thing that I exposed for, which results in everything else being a black hole, as well as a quick levels adjustment I made for air...basically just dropped highlights to 100IRE and pulled the mids up a bit. On my A7sII, it would look well balanced. :-)

Cliff Totten
November 17th, 2017, 02:05 PM
Well?....Slog doesnt really "do away" with anything. Its just a curve. Its a signal compressor. You should expose Slog to the right a stop or two. If you are not clipping your highlights, you can keep going and could get you deep into your shadows. When I say "keep going" I mean open your iris more and more or slow your shutter speed down to let more and more light hit your sensor. Just watch clipping like a hawk.

If you can use Slog in "low light" without needing gain/ISO and your highlights are bright but not clipped, than you did a good job and are prolly recording everything your sensor is able to see. I say "low light" because everybody has a different idea of what that term means.

Dont forget the Hell that Slog places on 8bit CODECS. Be ready to pay a "possible" nasty banding penalty in 8bit.

Also, MPEG, when stressesd will sacrifice bandwidth in the shadows FIRST. Your blacks and shadows will get blocky if the scene is too complex. If you are shooting tons of shadow, h.264 will dump that area of your video quick when it hits its bandwidth cap. ProRes HQ wont sacrifice shadows like this and "stretches" to rec709 better then a highly compressed h.264 long GOP does. 10bit Slog is basically bulletproof but 8bit Slog is a 50/50 hit and miss

When you normalize 8bit Slog, if you have allot of shadows, not only is Slog going to stress that 8bit normalization, but h.264 artifacts could be strong too..

Lou Bruno
November 18th, 2017, 07:53 PM
Thanks to all. I just received my AX-700. I have been in the video field since 1982. I still enjoy being enlightened by new technology in cameras. With that said, I have lots to learn about S-log. I am sticking with 709 for now. Lots to study and will be following this thread as well.