More about color temperature

The concept of color temperature is applied for color photography. As previously mentioned, our eye has the ability to adapt to lighting conditions, almost always perceive colors correctly, even when the lighting will have a strong dominant such as red as the sunset. However, in such situations, digital equipment requires proper setting. For measuring the color temperature gauges are special. They can show the actual color temperature and the number of the filter, which compensates us dominant. The digital video recording can match the final color image to the currently prevailing lighting conditions. Serves the function of white balance (WB). Its use is to match the values adjustable to the prevailing light conditions.

Color Temperature

Very helpful concept is the color temperature of light. Explaining the issue, Let's take an example. As everyone knows, we need to get a light warm up a body to a very high temperature. On this principle operate incandescent bulbs (the sun, too). Tungsten filament is heated by flowing through an electric current is not and starts to shine. Depending on this, the high temperature as it warms, it will shine a very bright or less intense, and thus, the color of light will change. Very easy to see the effect of torches, when the batteries are exhausted and the bulb gradually begin to produce less and less light - its color changes from dark yellow to yellowish red through and then goes off. It is associated with a drop in temperature to which the tungsten wire is heated up. The lower the temperature, the light is less intense and committed to its color red, the higher the temperature, the more light and its color changes in the direction of white. In case of further raising the temperature starts to dominate the color blue. As you can see, a given temperature corresponds to the specific color of light.

Few things about the light

White light is really a mixture of waves of different lengths and what's involved, different colors ranging from blue through green, ending in the red. The scope of the visible spectrum below shows the graphic illustration. Radiation at wavelengths shorter than violet is called ultra-violet, while the waves longer than red are called infrared radiation. The human eye registers the specified portion of spectrum known as visible waves. Photographic and digital sensors are so designed as to record the same spectral range, which captures our eye. White light is a mixture of all colors, but when one of them begins to dominate the resultant color of light changes. Our eye is able to automatically adapt to a fairly broad range of such changes, and usually we see the color properly, while the digital sensor that possibility in itself does not, and record exactly what is in reality.

Microstock photography

Stock photos are largely professional, or semi-professional presentation and sale of images made through websites. The above-mentioned thematic web sites are nothing more than `stores`, magazines often contain several million images. Professional stock agencies enableselling photos even to novice photographers, provided that certain criteria are met, and actually a lot criteria.

Cyberstalking

Oh my, I just came across an awesome website, quite scary though! If you want to find out who is cyberstalking you, visit StalkInfo! They show you the location of your stalkers ona map! Cool, huh?

Camera Obscura - the beginnings

Camera obscura is a box or a locked room to which the light enters the interior through a small hole. Hence the name comes from the Latin camera obscura, a darkened room. Image of the pinhole camera is created on the basis of the intersection of the rays extending from the subject, which form on the film discs. The size depends on the diameter of the pinhole and the distance at which the photosensitive material is placed. However, the camera lens glass refract the rays from the object and focus the camera obscura to form punkty. The history of Camera Obscura dates back to ancient Egypt. Reportedly, the priests of Amun god Ra - the Sun God during the reign of Anenhotepa III were already familiar with the image capture. This hypothesis was announced by McCarter in 1928. This hypothesis was not confirmed until today.

The inverse focal length rule

I concluded that the rule of the inverse of the focal lenght has been adopted rather empirically, so there is nothing to hold on to this principle. Besides, it is not going to be linear, so it is not worth it to keep rigidly to this principle. Time to rev gave in the case of the calculator is 300 x 1.8 1 / 480 which means 1 / 500 exposure time.

But I suppose as a rule of thumb it gives you good idea on when to shoot from hand and when to use a tripod.