Lens of MTF

We often see masters in the network to discuss how the lens Casio NP-L7 battery(MTF performance, or in the original factory lens's official website page MTF charts, then this see MTF charts is what mean?

MTF is English "Modulation is the Casio NP-130 Battery abbreviation of" are ', it is the way to detect the quantitative lens solution as a mechanism to force. In simple terms, MTF is to make the lens photography black and white crisscross lines, while the two lines loose, we can easily identify two lines, it means the lens of the solution of the force has to limit as.

The Casio XV-3 battery measure of a lens imaging quality on a number of factors, such as color difference, deformation, etc. The only it can show MTF the most basic solutions like force, but to deformation, resistance to YaoGuang etc is impossible in test that, MTF but was a very objective standard.

MTF characteristics graph reflect lens to the edge of the central position graphics performance. Chart of horizontal axis, from 0 to 20, representatives from 35 mm image center to format a diagonal Angle along the distance, is about 21.5 mm. Chart of vertical axis, represents the lens in the record of the two different direction, different thickness lines shows accuracy, the characteristics graph of the solid line and dashed, corresponding to fox shape line and the meridians. In theory, a perfect lens will figure out the top MTF features a straight line, representative from the center to the edge of camera position has 100% of the accurate reduction degrees. Of course in fact did not exist such perfect lens, so the general MTF characteristics graph of the line is curve, from the left to the right (tracking lens move by the center to edge quality change, curve tends to decline).

From the graph,Digital Camera Battery MTF characteristics can be observed under two aperture of the score, aperture full open and f / 8.0 aperture, focus is set to infinity way focus. Although the figure does not include other MTF features some choose a shot the important consideration of factors, such as size, price, processing, recent focus distance, automatic focus speed, like the poor, bright balanced degree, and whether can improve the quality of image with image stabilizer and so on, it is a technical reference, learned about individual lens optical properties.