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.
Image: walmart. At present, the only versions available on Walmart's online store are the aluminum Apple Watch Sport in Space Gray with a black band and Silver with a white band. No discounts are offered, with both being sold at the usual $349 (38mm) and $399 (42mm) price points.