The Histogram:
Governing the scale from the average scene, to low and high contrasting scenes .
What the eye sees as an average setting my not be what we get when taking the picture. And depending on your camera setting, with where the meter reads, the exposure also depicts the over all and final image ( the desired result)
Many of the images, where I tried to read the light, that has a higher latitude . Like with transparency. Digital is less tolerant with high lights. When using spot metering .
Contrasting lighting is often recorded . The Histogram reads this and gives good valuation to the tonal range of the picture. However; using average metering . The histogram also gives a good guide on where to expose if the result that you trying to gain does not appear to what your trying to crate. EG on the camera High light warning shows a white area where highlights go over the recordable ability of the sensor.
So To gain detail in that area, you may stop down, to aid correct exposure.
Also, this shows where shooting raw and J pag can differ in the amount of information that is recorded.
Example of Raw and Jpag:
The two below are from the computer. The Jpag is from the raw image produced by the software.
Unfortunately I could not up load the raw file to here I have included a screen shot off the Raw images.
left is the Raw. On the Right = jpag. these two are a good sample to show how a histogram reads contrast and colour.
Noticing right away how the camera's highlight warning, flashes a black area, pointing out where high lights burn out.
I see how watching the Histogram The values of the intensity can be pulled back, by underexposing.
Rendering richer colour and a more even exposure.
So this is like using a hand held light metre, with out having to move in to evaluate the scene. And by using spot metering, can gain more accurate exposure.
Governing the scale from the average scene, to low and high contrasting scenes .
What the eye sees as an average setting my not be what we get when taking the picture. And depending on your camera setting, with where the meter reads, the exposure also depicts the over all and final image ( the desired result)
Many of the images, where I tried to read the light, that has a higher latitude . Like with transparency. Digital is less tolerant with high lights. When using spot metering .
Contrasting lighting is often recorded . The Histogram reads this and gives good valuation to the tonal range of the picture. However; using average metering . The histogram also gives a good guide on where to expose if the result that you trying to gain does not appear to what your trying to crate. EG on the camera High light warning shows a white area where highlights go over the recordable ability of the sensor.
So To gain detail in that area, you may stop down, to aid correct exposure.
Also, this shows where shooting raw and J pag can differ in the amount of information that is recorded.
This is a direct jpag from the camera
The two below are from the computer. The Jpag is from the raw image produced by the software.
Unfortunately I could not up load the raw file to here I have included a screen shot off the Raw images.left is the Raw. On the Right = jpag. these two are a good sample to show how a histogram reads contrast and colour.
left raw
Right. jpeg
The blues or highlights in the sky, As seen on the top picture, are weaker and lighter.
To show more extreme examples as part the exercise. Here is a sample of a low contrast. 1 mid tone average contrast 2 and high contrast 3 each with 1 stop up and 1 stop down from the cameras exposure. P shots in all. Plus histograms.
Each exposure is 1st exposure = normal. the 2nd under 1 stop and the 3rd over exposed 1 stop.
LOW CONTRAST
MID CONTRAST
HIGH CONTRAST
Noticing right away how the camera's highlight warning, flashes a black area, pointing out where high lights burn out.
I see how watching the Histogram The values of the intensity can be pulled back, by underexposing.
Rendering richer colour and a more even exposure.
So this is like using a hand held light metre, with out having to move in to evaluate the scene. And by using spot metering, can gain more accurate exposure.
