The Camera Lens Application Skills

Aspherical lenses, when parallel light through normal lens

, through the lens of the middle light can accurately photographic element in focus, focus formation, but through the lens edge light, will be in photographic canon lp-e6 battery elements formed a focus on another front, so that created the focus is not the same picture, makes the picture becomes fuzzy not clear, we call this phenomenon for spherical aberration.

If you want to solve the spherical aberration caused by problems, we can use all sorts of concave and convex to correct, but these lens correction ability is limited, so each lens manufacturers developed the QiuMianJing to solve this problem, the so-called the QiuMianJing is refers to the middle of the lens and the edges of the radian radian lens is different, so as to fixed refraction of light from the point of view of the problems, ensure that through the lens of the light of any position can be accurately focused on photosensitive components, form accurate focus, improve the degree of sharp picture.

A piece of the QiuMianJing corrective spherical aberration ability than many other convex, concave lens is much better. The use of aspherical lenses made except imaging lens well ability, also greatly to reduce the weight of the lens.

Low dispersion lens in the daily life have seen the light is made of different wavelengths mixed, when light through the normal lens, will because different wavelengths produce some changes, such as the refractive index, refraction Angle, make with this phenomenon is called from the dispersion.

In order to improve the light due to its own characteristics of dispersion problems produced, and the camera manufacturers in a canon lp-e5 battery scene in the low dispersion lens, the so-called low dispersion lens is refers to can make different wavelength of light through the lens to produce the same refraction Angle, can let the image of colour more saturated.

The past lens focus is to move the camera on the lens to finish within all, so the burden of the drive motors is very big, and can't improve focus speed, focusing voice also big. In front of the focus lenses are as mobile, cause use a polarizer inconvenience. So now the majority of businessmen have to switch to focus system or RF within IF after focusing system.

This information from: http://www.powerlinebattery.com

by: startbattery

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