

8% probability that an Acme chain will snap under 19,800 pounds of stress.

Given a constant IV, the calculator will be correct in its price estimation, however since IV is a reflection of market sentiment and external variables, it is impossible to predict what people will be thinking in the future. Simply fill in the thickness, activity (in Curies) and source-film-distance and you get the correct exposure time. Gamma match diagram this is the gamma match design that i have used for years and is also similar to what avaniti uses i have seen designs using a 5 1 2 gamma tube 2nd drawing below. The distance between gamma tube and loop tube = Circumference of the loop / 70.
