Q1 ours does 15625 lines per second I think, that is for the old crt system. I do not have the slightest Idea what the digital lcd system does. Q2 3.3333 Q3 8 Q4 It is the Width of slit in mm/speed of the shutter in mm/sec Don't quote me! Chris -----Original Message----- From: owner-photoforum@xxxxxxxxxxxxxxxxxx [mailto:owner-photoforum@xxxxxxxxxxxxxxxxxx] On Behalf Of ADavidhazy Sent: 16 January 2011 16:13 To: List for Photo/Imaging Educators - Professionals - Students Subject: Sample exam for your amusement It is midterm exam time again and so if you'd like to see if you can figure out answers to questions never before having beforehand heard the answers (Reminiscent of Karnak the magnificent?) this link takes you to a sample exam covering 5 weeks in which standards, shutter calibration, velocity and rotation rate measurements, electronic flash concepts and intro to time lapse and high speed imaging were discussed/ covered. http://people.rit.edu/andpph/text-exam-sample-high-speed-2010.html ;) Andy