Able Cine has built a great rep as a go to source for modern day videographers and cinematographers. They stock not only the cameras and major hardware that we all need, but many of essential bits and pieces to fill out a package. Sometimes even developing their own hardware to fill a void such as their lens collimator. My most favorite tool is their field of view calculator which allows you t o compare the field of view (FOV) of particular lens of one sensor to another. For instance, if you want to see how much a 50mm lens covers on a RED One Camera compared to a Arri Alexa this is the tool for you. It’s mobile friendly and works great on iPhones and iPads –iIt even warrants a weblink on my iphone home screen.It’s free, check it out here.
To read more about it, Abe Cine has this overview.