September 5, 2014 at 2:07PM

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Odyssey 7Q SLOG 2 LUT ?

Hey everyone - whoa, it's a new site!

So I've been shooting with the 7Q on and off with the Fs700R RAW - I really like the combo, however fiddley the whole setup is. My question: Has anyone noticed that in recent firmwares the SLOG 2 LUT doesn't quite look Rec.709 anymore? I find it to have a sort of magenta hue, granted I've only tested on one unit. The color fidelity of the Odyssey is in any other case bang on, so I found this odd.

Thanks for any input on this - not the most pressing but having something for producers and directors to look at that looks semi-normal is always helpful on set.

6 Comments

Due to the noise presented by Slog2, we tend to overexpose by at least a stop. Most of the FS700's usable DR seems to live in the highlights (especially in raw).

In doing so, the internal "Rec.709" LUT on the O7Q is pretty useless. It just blows most everything out and turns the other bits magenta, as you mentioned.
I have been patiently waiting for the past few months to get loadable LUTs for the O7Q.

If anyone has any insight on how they like to expose their FS700+O7Q I would be sincerely interested.

September 5, 2014 at 6:23PM

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Trevr Merchant
Cinematographer | Editor | Colorist
27

Interesting point - I've been content putting middle gray around 35IRE, and the waveform seems to confirm the LUT is stretching things back out correctly; but it's worth testing to see how it handles higher IRE levels. The a7s seems to love a very high, almost over exposure, in it's "slog 2" setting - so maybe the tried and true methods of the F5/F55 workflow have to be changed slightly for this sensor?

Without a doubt, I can NOT wait for custom LUT files - the smallhd monitors have been a dream to work with. Why the wait, CD?

Alex Enman

September 7, 2014 at 1:41PM

Alex - can you comment a bit on how you like the setup and how its been working for you? The combo was on my 'before end of year' purchase list - but I guess now ill wait until we see what the new camera is... but I've used the 700 plenty, just never paired it with the monitor. Has space been an issue - have you done anything requiring a lot of storage for the RAW files?

Thanks!

September 6, 2014 at 12:14AM

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Scott Selman
Festival Producer, AFI DOCS | Filmmaker | Producer
1032

Space is an incredible issue! At least for 4K raw.
Compressed cDNG would be a huge help.

We really struggle only having 2x256GB cards.

In 4K 60p, you are looking at 6 minutes of recording time. For lower budget / less demanding b-roll shoots, we stick with the 4K2HD 60P.

Trevr Merchant

September 7, 2014 at 12:37AM

1 - 1 1/2 stops over is the common opinion and it avoids noise. But I read somewhere that the most of the data is always stored in the darker areas and that if you expose higher you lose the ability to gather that data (due to Sony's algorithms). So we have to be careful.
I can't wait to get some LUTs that will actually help me shoot better.

September 7, 2014 at 1:46PM

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Jan Becker
Director Producer DP
150

I always use my waveform and keep the exposure "up" and just make sure not to clip. Adjust my false colours to drop everything below 20%, then I know when I bring my exposure back "down" what I will keep/lose in the shadows.

Knock on wood, this system has been working well for me so far.

Can't wait to be able to load my own LUTs into the 7Q :)

September 7, 2014 at 8:17PM, Edited September 7, 8:17PM

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seanmclennan
Story Teller
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