Identify the quality of the lens

The sony np-fm50 battery lens will directly affect the image quality of the photo. The new lens, the mechanical part of the skin should be clean, smooth, no scratches and wear marks, no rust visible mold, no collision injuries; if electroplated parts, coatings should be uniform, at least no rust marks and yellowing, free from Shell and flaking.

In sony dcr-sr60 battery addition to some of the lens optical properties, such as resolution, color and other data required by reference to the actual shooting or to obtain relevant information, the other can use their experience to identify their advantages and disadvantages. The specific method is:

1, the lens aperture open to the maximum, the backlight observed within the lens to see whether there is visible mold each piece lens, scratches, chipping, and whether to open plastic. Some lenses may have bubbles, but as long as these little bubbles and not in the central region, it will not affect the image quality.sony np-qm91d battery

2, the aperture progressively reduced, with the exception of light transmission hole center, the other was the site of the aperture blades should not block the light. Then it should try to pick a half between each grade level gear aperture lens, because it is very useful for precise control of exposure.

3, rotating or sliding the zoom adjustment ring and focusing adjustment ring, to see the resistance is uniform.

4, the observation lens without distortion. First, the camera should be flat side, and then observed through the viewfinder close to the edge into a smooth vertical and horizontal frame the scene without obvious barrel distortion phenomenon.

5, observe the good and bad lens coating. Because the camera lens coating to reduce play between the light reflection in the lens to improve contrast imaging lens to enhance the role of color reproduction, it should be carefully selected. Selection method is: Firstly, the reflective surface of the lens to look at whether there is scratch coating. Then open the aperture to the maximum, so that lens at yourself, look into your own image is clear, such as the scene pale, indicating good coating, on the contrary, it shows poor coating. The coating color with multi-color color of the points, the selection of multi-color coating selection as far as possible, because it is superior in color reproduction and color coated lens, etc..

6, see whether the lens forms the interface with their own camera lens mount on the match.

7, the outer ring of each lens are marked on many figures, these numbers are engraved, but also in print. In general, the engraving of the figure is the number of printing durability.

8, the zoom lens of choice. In general, the greater zoom range, the worse the image quality will; the other hand, the better the image quality. In addition, the caliber of the larger zoom, the worse the image quality. Complex production process because the zoom lens, the greater the diameter, the higher the technical requirements of production, the more appropriate question.sony np-qm91d charger