RealD Pro Stereo3D Calculator for iPhone, iTouch & iPad by FrameForge Previz Studio

This Zoom Lens page is where you define what zoom range you have available.

This allows you to have the calculator limit its available focal lengths to the ones you'll actually have available for use on the set.

Click on any of the buttons to get more information, or click the USE ZOOM RANGE button to return to the Camera/Rigs Settings Screen.