Quote:
Originally Posted by dbuckwalter
Here is what I currently would like to have a tutorials about:
1. How to use a CPL filter. I have a CPL for one of my lenses and was shooting away with it then come to read some forums and various websites and find out you can rotate it to achieve different results. I have no idea how to use this filter and cant find any tutorials on it.
2. Histogram How To: I see posts about photographers using the histogram to determine a proper exposure. An intro to what a histogram is and how to use it when taking photos would be very helpful. I think this would translate into using Levels in PS(E) as well.
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Regarding Polarizers:
The front part of the filter can rotate to adjust the amount of polarization. The proper, intended use for these filters, is to cut glare and reduce reflections from all materials except shiny metal objects. A polarizer will help you to see through the glare of a river or a lake’s surface. Wildlife and nature photographers use polarizers sparingly, to cut the sky’s reflection on animal fur and feathers, and the land itself. To set a polarizer for such images, you point it at something earthy-brown in colour-this can be a tree bark, dirt, etc., then the front lens of the filter is rotated to give the brown dirt a dark chocolate-y colour-then it is ready to use for your nature, landscape and wildlife images. Polarizers can also deepen blue skies, making white clouds stand out, but realise that over-use can accentuate noise in blue skies. To cut glare the camera needs to be at 30 degrees to the water surface, or shop window to work 100%.To use for darkening the blue in skies, the camera needs to be around 90 degrees to the sun to have any visible effect, you just turn the front element to the shade you desire .
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Regarding Histograms:
By studying the histogram on the camera’s monitor screen, we can adjust our exposure compensation to ensure that the bulk of the graph is just to the right of centre, and each end is just touching bottom corners.- If left-hand side of graph climbs left screen edge, the shot will be under-exposed, with no detail in the shadow areas: If the same thing happens to the right-hand side, highlights will be blown, rendering the shot totally useless. For a second opinion, we can use the highlight flashes, also on the monitor screen, which flash black and white when highlights are blown.
regards, Ken