Originally posted by angerdan It's sure that is has between f2.8 and f4.0. According to DPreview it's 2.8.
Motor is DC type.
DPR probably copy-pasted the f/2.8 aperture of the 16-50 PLM they reported in the following sentence.
With that size it's gonna be faster than f/2.8. The D FA 21 will be roughly similar to the D FA 28-105 in size (73 x 86.5 mm);
FA 20/2.8 at a smaller size of 70 x 44 mm
FA* 24/2 at a smaller size of 72.5 x 65.5 mm
The Nikon 20/1.8G is slightly larger at 82.5 x 80.5 mm (with half the front of the barrel being clearance for a wide angle hood, the front element is ~49mm in diameter).