20 new things for today

1. I had lunch with Tony (he serves as the instructor for the junior students).
   
   1. During the lunch I realized that I should have paid more attention to the brand names of the tools, for he asked several times about the names which I cannot tell.
      
   2. He also mentioned that it is important to initiate, when I said there are relatively less casual talks on science compared with that abroad. He also encouraged me to initiate a party inviting all the Northeastern people of China in this institute, if I want to get to know people from other areas.
      
   3. He said he works 13 hrs a day.
      
   4. He pushed himself to read by listing the books, when he was in college. He doesn't need the list now, for he already got used to reading every day.
      
2. We use different lenses, and we differentiate them by their focal length (by saying focal length we simplify the lens set as one piece of lens). Larger focal length--like in our lab we have 105mm, 85mm, and 50mm lenses—means lower optical power, which is associated with larger magnification of distant objects, and a narrower angle of view. Conversely, shorter focal length or higher optical power is associated with a wider angle of view. In our lab we make two lenses connected front to front, and this makes the rears of the lenses facing cortex and CCD, separately. Fine adjustments should be made to make sure the cortex captured sharply on the CCD, which includes adapter applied between lenses or between lens and CCD, finely tuned distance between lenses and cortex, and etc.