Highlights are easy, you say, what about the shadows? I took a darkish area of the image, and applied a Draconian curve to it: ISO 3200, 0 EV push in Lightroom: ISO 1600, 1 EV push in Lightroom: ISO 800, 2 EV push in Lightroom: ISO 400, 3 EV push in Lightroom: ISO 200, 4… [Read More]
ETTR — just crank up the ISO? Part 2
SNR graphs are fine, but what does the preceding post mean with respect to image quality if I don’t push up the ISO to keep the histogram to the right? I wondered the same thing, so I did some testing. I took my usual noise test scene: And I made a series of exposures with… [Read More]
ETTR — just crank up the ISO? Not so fast.
When I was in college, I learned a colloquial formulation of the laws of thermodynamics: The first law of thermodynamics says you can’t get something for nothing; the second law says you can’t even break even. Exposure in digital photography is a little like that. I’ve been talking about ETTR for a while now. You… [Read More]
Scheimpflug for dummies
In making the test images for the previous post, I reacquainted myself with the frustrations of using live view in its present incarnation to adjust tilt angle and focus. What I really want is to be able to see magnified views of two portions of the image of my choosing simultaneously, so I can see… [Read More]
Stitched panos: slide or spin?
I’ve been following an email thread by some sophisticated and accomplished photographers that has touched on making stitched panos with (mostly) medium format technical cameras. The discussion has been almost entirely about lenses and backs/bodies that are appropriate to sliding panos. Since that’s not the way I make panos, I started wondering what I’m missing…. [Read More]
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