V1.02
Thom Hogan’s Complete Guide to the Nikon D300
Page 372
The outer circle is the normal image circle of a 35mm lens. The
brown rectangle is the 35mm film imaging area, the inner green
rectangle is the boundaries of the D300’s sensor. The D300 is
therefore seeing only a portion of the area a regular lens covers.
With DX lenses, the image circle is smaller (note the DX image
circle, shown here in dark gray, no longer covers the 35mm frame
but does cover the D300 frame):
It
is
important to understand that, because of the sensor size,
the D300 only uses the innermost portion of the image
resolved by most Nikkor lenses. When you read lens tests in