Shooting in log, no view assist and only iso 400-800

[CanadaDrone]

I shoot on a A7SIII and this is simply not true, i often shoot over 10,000 iso with log, when the environment requires it. Now, im not comparing this sensor to the one in the a7siii but to say it makes no sense to use high iso in the dark its completely false. I rather have to deal with the noise and a black image at a max iso of 800

Well it's a good thing I didn't say that then, isn't it? I did not say anywhere that "it makes no sense to use high ISO in the dark". Given that you quoted what I actually said before you changed it into something completely different, it seems you are disagreeing with no one other than yourself.

What I said was "Shooting Log footage at ISO 100 or extremely high ISOs defeats the point of it." The point of Log footage is to maximize DR for the scene while maintaining the highest possible flexibility in post, and if you shoot at the extremes of the camera's available ISO range, you lose much of your ability to do that. If you want to use your A7SIII as an example, set it to ISO 102,400 or 409,600 (if it will even let you) and let me know how the Log footage looks. ISO 6400 is the maximum selectable ISO on the M3 as far as I can tell, and I don't think it will even let you go beyond 800 in DLog (I don't have one to test).

The maximum DR with Log footage from the A7SIII is obtained at ISO 640, which is smack dab in the middle of the ranges DJI suggest for the same. Most modern sensors are similar in that respect. If you set a value above or below that, you are simply changing the distribution of the DR, which is clearly explained earlier in this thread along with the compromises that come with it.

The scope of this discussion, at least to my understanding, was the M3 and that was what I was basing my comments around. "Extremely high" ISO is a relative term as every sensor has different capabilities. High-end full frame video equipment with a dual gain sensor and dramatically different low light capabilities is a different discussion, but the basic principles still apply.

 

[tomic]

Well it's a good thing I didn't say that then, isn't it? I did not say anywhere that "it makes no sense to use high ISO in the dark". Given that you quoted what I actually said before you changed it into something completely different, it seems you are disagreeing with yourself.

What I said was "Shooting Log footage at ISO 100 or extremely high ISOs defeats the point of it." The point of Log footage is to maximize DR for the scene while maintaining the highest possible flexibility in post, and if you shoot at the extremes of the camera's available ISO range, you lose much of your ability to do that. Set your A7SIII to ISO 102,400 or 409,600 (if it will even let you) and let me know how the Log footage looks. ISO 6400 is the maximum selectable ISO on the M3 as far as I can tell, and I don't think it will even let you go beyond 800 in DLog (I don't have one to test).

The maximum DR with Log footage from the A7SIII is obtained at ISO 640, which is smack dab in the middle of the ranges DJI suggest for the same. Most modern sensors are similar in that respect. If you set a value above or below that, you are simply changing the distribution of the DR, which is clearly explained earlier in this thread along with the compromises that come with it.

The scope of this discussion, at least to my understanding, was the M3 and that was what I was basing my comments around. High-end full frame video equipment with a dual gain sensor and dramatically different low light capabilities is a different discussion, but the basic principles still apply.

That’s all fine and dandy, what I’m suggesting is that dynamic range is not the only consideration and 800 iso is not enough for some light conditions. I’m willing to give up some DR and allow more noise in my image in some situations. It’s a trade off as you know.

I can’t do that with this drone, in log.

 

[CanadaDrone]

That’s all fine and dandy, what I’m suggesting is that dynamic range is not the only consideration and 800 iso is not enough for some light conditions. I’m willing to give up some DR and allow more noise in my image in some situations. It’s a trade off as you know.

I can’t do that with this drone, in log.

And nobody in this thread has stated that dynamic range is the only consideration. I am happy to engage in a discussion, but I am at a loss as to what you are disagreeing with because you are responding to things that were never said. There will be a point on the ISO spectrum where maximum DR is achieved in both the shadows and highlights - changing the ISO value either way will shift the distribution of that DR, as described earlier in the thread, and comes with the compromises described earlier in the thread. Setting an ISO value at one of the extremes of the sensor's capabilities will not yield a good result. ISO 10,000 on your A7SIII would be comparable to a much lower ISO on something like the M3 in terms of how it will look and what you can get out of it, to the extent they can even be compared.

It appears the M3 is limited to ISO 400 and 800 in D-Log, I feel like that was addressed very early on. If the drone itself will not allow you to move beyond those values, then that's all there is to it. In the case of the M3, if you want to select a video ISO higher than 800, it appears you need to shoot outside of D-Log unless someone who owns the drone can confirm otherwise. If that is a problem for your work, perhaps you would be better served by something else.