Rotator cuff injuries cause pain in your shoulder and upper arm. The pain may be most noticeable when you reach up or out. When you turn your arm as you lift it, the tendons are more likely to rub against surrounding structures.
The essential difference between the original series of AF Nikkor lenses and all AF lens types introduced subsequently, from the AF-D versions onwards (see below), concerns the compatibility of a particular lens with Nikon's enhanced Matrix metering system known as 3D Matrix metering that was introduced during 1996.
convention, if there is any difference. Nikkor is the standard designation for Nikon's lens lines. The first 'Nikon' lenses were the Series E lenses, which were a lower-end consumer line frome the late 70's and 80's. I'm not sure if any of the low-end lenses still use that designation anymore. Jan 9, 2007.