Pushing the ISO

I love my 1D4, but it's not full frame.

I'd like to use my 1DS3 more but it tops out at ISO3200.

I've read somewhere that you can push the ISO, effectively underexposing by two stops and then pushing the exposure in Lightroom by two stops giving you an effective 12800 ISO.

I was always under the impression that a bad exposure leads to more noise and grain but is it was deliberate underexposure by the camera does this make a difference?

I'm not sure I understand your question. But if your question is whether underexposing in the camera and then adjusting exposure in LR will give you more noise than exposing appropriately in camera, the answer is usually yes. But try some and you will see for yourself.

Yes , you can do that and, it will increase your noise, but LR 3 has a great new noise reduction algorithm that works as well or better than the third party plug-ins that are available.

chauncey wrote in post #11193379
Yes , you can do that and, it will increase your noise, but LR 3 has a great new noise reduction algorithm that works as well or better than the third party plug-ins that are available.

+1
Increased noise and reduced DR, but better than a blurry shot and much better than not shooting.

Gel wrote in post #11193347
I was always under the impression that a bad exposure leads to more noise and grain

Have a read of the Hamsttr thread.

Interesting thoughts on whether a + exposure compensated shot adjusted in PP with - exposure compensation might be advantageous.

Was just about to post a link to there
Ah well, since I already searched it, here it is:
https://photography-on-the.net …p?p=8700061&pos​tcount=117

This is pretty common among some low light shooters. Although it's best if you can get a shot using a "true" ISO, the fact is that sometimes conditions don't play along.

Noise reduction done well can help a lot, as others have been saying!

Now, if you are going to experiment with this, just make sure you shoot Raw to avoid messy artifacts! Although Lightroom can do a lot with jpegs it is still safest to use the full Raw if you are going to mess much with exposure.