hdrsoft photomatix pro – How do I select the exposures?

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hdrsoft photomatix pro:To get good results with Photomatix, your capture sequence must include photos that correctly expose highlights and photos that correctly expose shadows. The latter is especially important to avoid noise showing in the processed HDR image.
The number of photos you need depends on the scene. It also depends on the Exposure Value (EV) spacing separating the photos. If you take them in one-EV steps (e.g., -1, 0, +1 EV), you will need more photos than if you take them in two-EV steps (e.g., -2, 0, +2 EV). We recommend shooting in two-EV steps whenever possible.(Best HDR Software Comparison)
In the lightest photo of the sequence, the darkest shadows should be at least in the mid-tones. You can check that with your camera’s histogram preview in playback mode. In your most overexposed photo, the left part of the histogram should be empty until 1/3rd of the histogram’s width. If this is not the case, you will have to add one or more photos taken with longer exposure times.
Another option is to re-shoot the exposure sequence with the normal exposure set one or more EVs higher if your most underexposed image in the exposure sequence was too dark. This is the case when the histogram of your darkest image is completely empty on the right half.
hdrsoft photomatix pro:High contrast scenes can be grouped into roughly two types depending on their dynamic range:
· Medium dynamic range scene: Most landscapes and other types of outdoor scenes fall into this category. Three exposures taken in two-EV steps (i.e. -2, 0 +2 EV), or five exposures taken in one-EV steps, are usually sufficient for this type of scene.
· High dynamic range scene: A typical example is the interior of a room with a view outside the window on a sunny day. You need to take at least five exposures in two-EV steps (or nine exposures in one-EV steps) to capture this type of scene, but you may need more. Taking the exposures manually is recommended in these cases.
Here is how to select the exposures when you need to take the exposure manually for the High dynamic range scene case described above.(Photomatix Pro Coupon Codes)
· Set your camera in manual exposure mode and select an aperture that is the most appropriate for your scene (e.g. f/8 for a motionless scene) and the lowest ISO setting.
· Measure the light in the highlights you want to preserve (in Av mode to point only the highlights, otherwise with spot metering). Take a shot with this exposure – let’s name it time T1 – and look at the histogram to check that no important area is burned out.
· Measure the light in the shadows by pointing (or spot metering) the darkest area where you want to see details – let’s name it exposure time T2.
· The ratio log2(T2/T1) gives you the number of E.V. needed to capture the dynamic range. We recommend an EV spacing of two f-stops apart for Photomatix (see question above), so your lowest exposure will be exposure time T1, the next one will be two stops more (i.e. T1 multiplied by 4), and so on till you get at the longest exposure time T2.
If you cannot achieve the number of shots and exposure settings with the Automatic Exposure Bracketing function of your camera, then you will have to bracket more than once or set each exposure individually. When you need to manually change the exposures or brackets, using a tripod will be necessary.

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