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.
Find a Best Buy Kiosk âº. This is a Best Buy Mobile specialty store. This store's focus is on mobile devices like phones and tablets, along with their accompanying plans and accessories. But you can pick up other items here, too. Most Best Buy Mobile stores are located in shopping malls. If you choose to pick up your order at a Best Buy Mobile store, please double-check the location to make sure you head to the right place.