Can you please explain this, please ?

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PhotoKhan Forum Pro • Posts: 11,573
Can you please explain this, please ?
1

Isn't a 1.4x TC supposed to cut light by only 1 stop?

I was testing the RF 1.4x TC I bought, on the R5, with Tv 1/1000 selected, auto-ISO.

These two shots exposures seem quite close one to the other (certainly not 1-stop different from each other).

But the camera bumped up the aperture by 1 stop (...f/8 to f/11as expected...) but also adjusted the auto-iso from 1000 to 2000.

...Why this other 1-stop increase in ISO, then?

PK

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