Digital SLR Tutorial Lesson sensitivity.

Sensitivity (ie ISO) refers to the sensitive feelings of the body the ability to light. .In the era of traditional photography, photographic body is negative, and in the era of digital photography, CCD or CMOS camera is used as a photographic original. .The higher sensitivity (that is, the higher the ISO value), the shooting, the less light needed, the lower the sensitivity when shooting needs of the more light. .A <! - Content start -> sensitivity (ie ISO) refers to the sensitive feelings of the body the ability to light. .In the era of traditional photography, photographic body is negative, and in the era of digital photography, CCD or CMOS camera is used as a photographic original. .The higher sensitivity (that is, the higher the ISO value), the shooting, the less light needed, the lower the sensitivity when shooting needs of the more light. .The most common ISO values generally are: ISO50, ISO100, ISO200, ISO400, ISO800, ISO1600 higher when the ISO value, the sensitivity will be. .The entry-level digital SLR camera's sensitivity is usually from 100 take-off (NIKON to ISO 200), generally have the highest strength to ISO 1600. .The sensitivity of each of the two adjacent numbers between the capacity difference is twice as sensitive, that is, ISO100 ISO50 photosensitive capacity is twice the capacity of the same photoreceptor is ISO800 ISO1600 twice. .This method of calculating the course in front of us mentioned the aperture and shutter are the same. .Sensitivity with the aperture, shutter speed, as in between two adjacent numbers have a "level" or "a Grid," the gap. .Therefore, we converted the exposure, the same can also bring into the inside of a change ISO. .For example: F2.8, 1/60s, ISO 100 = F5.6, 1/60s, ISO 400 (because the aperture grid to reduce the amount of light the two, so the ISO sensitivity on the right side increase the cells make up the two back) increase sensitivity .can help us in the dark environment is the occasion to take pictures without using flash, or a large aperture lens to assist, but it also has a hard to endure the disadvantage is that the higher sensitivity when the photosensitive body, the .taken out of the picture the more coarse particles will be made, the picture noise will increase. .General digital SLR camera noise suppression and coarse particles, but also for the ability to score rating is an important basis for the time. .Let's look at the use of low sensitivity with high sensitivity in both cases, the picture noise difference with how particles: <p align="center"> original, ISO 100 to shoot using ISO 100 shooting .magnified map, fine particles in comparison when using ISO 800 Enlargement, relatively large particles, while the noise has changed a lot </ p> magnified images from the above, you can see the increase sensitivity, the negative impact on the screen .. .If the photographer asked the general picture detail and high degree of quality, not as much as possible when shooting with high sensitivity settings. .Lack of time because the light is bound to take time to stretch or fill light, so flash or tripod to become an essential tool. .If viewed from another angle, high-sensitivity caused by the coarse particles are sometimes used but can be used properly, become another kind of special photographic effects. .In the previous era of traditional photography, and sometimes coarse particle effects in order to shoot photos, we will deliberately use the high sensitivity of the film to shoot, and then re-use of films in the red hot way to shorten the time to increase the noise and grain. .Now just a simple setting in the shooting about speed, and then in the post system, the use of image processing software, click again to get great effects. .<p align="center"> use of high ISO noise with the coarse particles, to create different visual effects </ p> <p align="center"> </ p> <p> Getting Started tutorial series digital SLR: .</ p> <p> Digital SLR Tutorial Lesson equipment to prepare papers (a) Digital SLR Tutorial Lesson equipment to prepare papers (b) digital SLR Tutorial Lesson Tutorial Aperture Lesson digital SLR digital shutter .Tutorial Lesson exposure SLR digital SLR Tutorial Lesson Tutorial depth of field digital SLR Digital SLR Lesson Focus Lesson Tutorial Tutorial speed digital SLR Digital SLR Lesson Tutorial exposure compensation point of the tenth lesson .Metering Tutorial XI extra digital SLR digital SLR then flash the basic composition class XII Tutorial Tutorial thirteenth class of digital SLR histogram (histogram) Digital SLR Tutorial Lesson XIV method of manufacturing shallow depth of field <! .- content end --></ p ><!-- end content ->.