Is high ISO like autofixing an underexposure?

01/25/2007 05:23:54 PM · #29

I haven't seen anyone mentioned that faster ISO allows a faster shutter speed, so even if there was NO difference (and there is), you'd probably have sharper images and freeze the action better with a high ISO.

01/25/2007 05:56:32 PM · #30

Originally posted by Gordon:

Here's the thing I was inarticulately trying to explain.

Raw capture, linear gamma & exposure

Should clear things up.

Fascinating article. It explains why I don't necessarily trust my histogram as much as I used to; now I understand why a bit more. It, of course, opens up more questions but is a fascinating white paper. :)

01/25/2007 05:58:42 PM · #31

Originally posted by asimchoudhri:

... But, people will make fun of you if you say "That night-shot looks great, but the details in the background are lost due to the quantum mottle."

My undergraduate degree is in physics... I like explaining things like that. LOL!!!

Canon RF 24-70mm f/2.8 L IS

01/25/2007 06:02:56 PM · #32

For myself, I probably spend more time worrying about light curves, exposures, signal-to-noise ratios, bit counts and other such technical things and that is why my images perform so poorly. What I should be doing is saying, "Wow, that looks cool!", and go with that. LOL!!!

Ivo

01/25/2007 06:20:37 PM · #33

Originally posted by cryan:

Ivo, you said you've had to do much post work when you shoot at anything higher than 100. I have shot at 1600 and been able to blow up to 8x10's and not seen as much noise as expected. Take a look at my volleyball shot is my portfolio, they were shot at 1600, the prints of those were absolutely amazing.

beautiful images and you're right about the lack of noise. I guess I need to spend a bit more time messing with it.

kirbic

Canon EOS R5

01/25/2007 06:40:40 PM · #34

Originally posted by stdavidson:

Fascinating article. It explains why I don't necessarily trust my histogram as much as I used to...

Indeed, the histogram "lies" a bit; more so with a luminosity histogram than individual RGB histograms. The tone curve can offset it to the high side, but the fact that it's reporting luminosity can mean it's off on the low side... one channel can be blown and the luminosity histogram may very well not show it!
Even with an RGB histogram, I find it useful to set the camera to record with a conservative tone curve, such that it doesn't report blown highlights too early.
I'm still a big fan of "expose to the right" and routinely pull back to recover slight clipping on one or two channels.

Edit:
It's sad that Bruce is gone; he was a tremendous asset to his field.

Message edited by author 2007-01-25 18:41:33.