A Most Underrated Accessory - The Teleconverter

You've been in this situation.  You are out shooting and the longest lens you have with you, just doesn't have quite enough reach.  You can make the shot, but you will be cropping in a lot in post and you know that doing so is going to cost you image fidelity.  But, buying a super telephoto just isn't going to happen.  You don't have a business case, or even the funds for something really long, and you wouldn't use it all the time anyway.  Is there an option?  Yes, the option known as a teleconverter.  In this video, I explain how teleconverters work, where they make sense, when you cannot use one and both the upsides and downsides of these wonderful tools.