Wednesday, July 6, 2011

Exercise 8, Cameras Dynamic range.

To find a scene , that shows an Area of dark shadow. like a wall or house with a door way sun lit from the side. Showing the white of a sheet of paper, or white wall. to make an exposure and adjustment, to show detail. And the effect of noise.

Even looking for just the dark shadow with cream ir dirty walls or another colour , absence , where there would be darkness, there it light. Even in the day Due to the building, facing away from the sun, interiors are badly lit inside.  Doors either closed. . Or as I was putting white paper up. I could up set locals due to superstition.

This exercise will have to wait , when the time is right.

Day 4 much later. Morning walk , round the village. Yielded nothing. Then I thought about my last assignment. A dark window. the light does not fall on it but the wall next to it.  I went back at 5.30pm To observe the light .

Great !. I stood back taking in the hole image. 400 d camera set as asked .

 1/80 sec F6.3

Here in the above photo, in aperture 3, I zoomed into the dark shadow , opening up the exposure in aperture. I could not see any detail, Slight noise . But lost all high lights on the right. 

1/80 F6.5
Same here.  To expose for the shadow, I had should have use a try pod. .  Setting up in the heat and fast dropping sun , I would have lost any light in doing so.  However . Same result as above. 

 1/80 sec f 20

In this image,  I have filled the frame and exposed from the white paper. As you can see, with an average exposure, the highlights have kept there detail. 

These are the shots and exposures taken for this dynamic range .

I am going to have to do this again on my 7d when I get it back from repair. As its the most used camera. I have , so i can find its dynamic range too. 

In observing this use of digital.  The previous exercise on highlight clipping. 
I now understand why my photography previously has lacked that punch and colour saturation. 
This has shown me how making sure that highlights hold detail, and the shadow areas can be opened up. With balancing the highs and lows . An even controlled balance can be achieved. 

Although the high lights do not show noise. A close watch on nose in the darker areas should be watched, when making adjustment. So as not to destroy or confuse noise with real detail. 

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