Get bright reference from spot meter

[pravdomil]

Is this possible? I want to make own auto ISO algorithm.
If not, can we read exposure compensation in manual mode, that shows the over/under exposure?

Not in live view.

[a1ex]

With the raw spotmeter you can read the brightness in stops. It's not yet accessible from scripts.

[pravdomil]

Even if you are not in live view?
And is possible read value on some address?
Is there a piece of code where ML work with raw spotmeter?

Thanks for quick reply.

[a1ex]

Grep is your friend.

http://www.codecoffee.com/tipsforlinux/articles/25.html

[pravdomil]

I have already searched, nothing suitable. I will seek further.

[pravdomil]

But you meant spotmeter from live view?

[Audionut]

The RAW spotmeter works in quick review.  However on the 5D3 at least, you have to be in live view mode to be able to move the spotmeter in quick review.

[pravdomil]

And some brightness value from metering point in viewfinder is not available?

[a1ex]

Look for AE_VALUE in consts.h. I couldn't find it on all cameras.

[1%]

Its in SetLvExposureDataToWinSystem on EOSM/650D/5d3

5d3 is somewhere around 0x2E764 + 0x71 maybe

[pravdomil]

Not set on 5D2.