When shooting standard film speeds of 24/25FPS using 172.8 degrees and 180 dgrees is normal to achieve an exposure interval of 1/48 or 1/50th of a second. Phew. That was long winded. Anyhoo, 1/48th and 1/50th are standard motion picture frame intervals, and they give you the motion blur that you would expect to see from a film camera >The very cool thing that the Varicam can do is shoot with an open or off shutteror 0 or 360 degree shutter. Turning it off increases the exposure interval to 1/24th or 25th of a second and lets a stop more light through. Wait…come back!…What makes this cool is that you can shoot at 50FPS and instead of effectively reducing your shutter angle to 1/100th of a second you can open the shutter and still get a 1/48 or 1/50th of a second interval and the same motion blur. Smoother Slo mo as a result. Also instead of taking a hit of a stop when you shoot at 50FPS you can turn the shutter off and have the same shooting stop. Easy-peasy! No getting out the bigger lights for slo mo.