How to distinguish between good and bad lens lens SLR camera?
Only by the eyes to see the quality of the lens, although unscientific, but there are some experience can refer to.
1: look at the lens coating reflective, reflective the weaker the better. There are many kinds of reflective colors, but the reflective color can not explain the quality of the lens. Look at the lens reflex is to see the intensity of the intensity of the reflective; In fact, the lens coating the weaker the better, in theory, the lens coating is not the most perfect reflective, the current highest level can achieve 2% reflectivity, that is to increase The highest rate of 99.8%.
Only by the eyes to see the quality of the lens, although unscientific, but there are some experience can refer to.
1: look at the lens coating reflective, reflective the weaker the better. There are many kinds of reflective colors, but the reflective color can not explain the quality of the lens. Look at the lens reflex is to see the intensity of the intensity of the reflective; In fact, the lens coating the weaker the better, in theory, the lens coating is not the most perfect reflective, the current highest level can achieve 2% reflectivity, that is to increase The highest rate of 99.8%.
Because this problem can not streamline the answer, so typing more, the key is to explain, clear your problem.
If you want to streamline, then three words: the lens of the front of the lens coating the more reflective, the better the lens; aperture leaves more, the better the lens; the greater the aperture, the better the lens.
Canon's red circle, L lens; Zeiss's T * lens; Pentax SMC, etc., are representative of the high quality of their brand lens quality (such as Nikon's N-shaped lens, gold ring lens; The
Also, the lens of the weight, indicating that the lens lens is optical glass, tube is a metal, in the precision and high temperature, than the resin lens and engineering plastic tube is much higher, resin lenses and plastic mirror Tube lens feel relatively light
