Why Exposing to the Right (ETTR) is BAD!

Started Mar 30, 2013 | Discussions thread
schmegg Veteran Member • Posts: 5,768
Re: Why Exposing to the Right (ETTR) is BAD!

mike703 wrote:

schmegg wrote:

Could you explain why?  As far as I can see if you underexpose by three stops (by using ISO 800 instead of 6400, but with the same exposure settings) you are just telling the camera not to multiply the signal by a factor of 8. Instead you do it yourself afterwards in PP (whilst protecting highlights).  Why would this not work so well with a Canon?

Because Canon sensors have noisy readout when compared to the EXMOR based systems (which I'm guessing you were discussing). So, if you underexpose by three stops and then bring it back up in post, you will end up with a noisier image than you will if you simply use the 'metered' ISO.

Yes, that discussion did indeed centre precisely on the EXMOR sensors.  Thanks for the explanation.  Now I've learnt two useful things in as many hours, not bad for a bank holiday!

No probs Mike - nice chatting with you.

Further to this ...

I'm not sure if you've seen this , but it's from a very decent chap regarding 'under and push' vs 'metered ISO' on an EXMOR (k-5 to be specific).

As you can see, there is actually slightly morenoise with the pushed image (4 stops), though, to be honest, I wouldn't personally call it significant.

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