Okay, I understand it the purpose of the test now - as long as there is adequate light, ISO 3200 is not a problem. Thankfully I already believe this
Your test would be the same as when you set to ISO 3200 to freeze a motion in bright daylight (let's say, you want to use f/5.6 instead of f/2.8 for sharpness and DOF reasons).
In both this case and yours (where the room is dark so you increase the Tv) the result is the same - enough light => noise not an issue.
Cheers!
Originally posted by pcarfan True. In dpreview I had mentioned how the 0.3 sec, makes it not applicable to real life situations. I see that I had skipped it here.
However, I think noise at 3200 is noise at 3200, what ever the shutter and aperture may be (with-in limits...not real long exposure). So, it is just a test to see what the noise is at iso3200.
Think of it this way. I wanted to make the room as dark as possible and do the test. If I turned on the table lamp, I could have gotten the shot at iso 3200, f4 and a healthy shutter speed like you would like (will be more applicable to real life situation). Now with that set-up, one might say, the room is not dark enough. Do you see where I am going.
So, given iso 3200 is iso 3200, and the aim of this test is to make the room as dark as possible and use a tripod to see what iso 3200 looks when ETTR, this is the ideal way to go about achieving those aims.
As iso 3200 is iso 3200, one would not gain any more knowledge by testing in a brighter room only to achieve a healthy shutter. It only introduces the notion that iso 3200 was used unnecessarily. Do you agree?
To answer your question. I use high iso exactly like you do, to get a good shutter speed. It is mostly in good light with thew 300mm attached to a 1.4 TC. Or available light indoor shoot where a much higher shutter tahn 1/3 will be required (could never do this with the K10D to my satisfaction, the K-7 handles it like a walk in the park below f2.8). So, an identical situation to the test will never occur in real life. Also, I will always choose noisier shot than a blurry shot exactly like what you say you would do.
P.S. Thank you for the civility in your question.