Thus, if your teleconverter provides a magnification factor of M (where M may be 1.4, 1.7, 2, etc.), and your lens has a focal length of F and an f-number of N, then the result of attaching the TC to the lens is to produce an effective focal length of M Ã F and an f-number of M Ã N.
Those on the hunt for an Apple Watch can find them online and in the Apple Store, Best Buy, Target and B&H Photo and Electronics in New York City. For those on a shopping mission, here are the five big things to watch for that can affect your bank account.
The Buyerâs Guide Method. One of the best resources when deciding to buy your next piece of Apple hardware is the MacRumors Buyerâs Guide. This provides you with a traffic light system that uses the average time between refreshes, and the time since the last refresh to deliver a verdict on whether or not now is a good time to buy.