Archived posting to the Leica Users Group, 2001/02/11
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]> Edmund's Scientific sells a convenient target that does just > this and is > calibrated in line pairs per mm. It's a bit on the expensive side > (compared to a newspaper), but if it would end this thread, it is > definitely worth it... > > http://www.edmundoptics.com/IOD/DisplayProduct.cfm?productid=1485 > Hum. I thought it couldn't be measured ;-) It states: "This unique target was developed to standardize an area of optical tolerancing that is most commonly determined theoretically. Our extensive experience in designing optical systems has shown that depth of field calculations can often yield very misleading results." Most interesting.