Comparison of Nikon 10mm ƒ/2.8 1 Nikkor and Pentax 8.5mm f/1.9 01 Standard Prime

Attribute	Nikon 10mm ƒ/2.8 1 Nikkor ×	Pentax 8.5mm f/1.9 01 Standard Prime ×
Magnification Ratio (x)	0.06	0.05
Filter Size (mm)	5	5
Focus Details	Rear focusing, with silent stepping AF motor (STM)	Autofocus with electronic manual focus
Closest Focus (m)	0.2	0.2
Lens Construction	6 elements in 5 groups, including 2 Aspherical elements	8 elements in 5 groups, including 2 Aspherical elements
Length (mm)	22	23
Focal Length (mm)	10.00	8.50
Diaphragm Blades Type	rounded	-
Brand	Nikon	Pentax
Image Circle	Nikon 1 (CX Format)	Pentax Q-mount
Name	Nikon 10mm ƒ/2.8 1 Nikkor	Pentax 8.5mm f/1.9 01 Standard Prime
Weight (g)	77	37
Type	Wide Prime	Standard Prime
Notes	For use with Nikon 1 compact system cameras. 2.7x conversion factor. Super Integrated Coating. Lens hood and case optional. Available in black, white	For use with Pentax Q compact system camera. Lens shutter. ND filter (2 stops light reduction). PENTAX SP (Super Protect) coating. Optional MH-RA len
APS Equivalent	27mm	47mm
Aperture (f)	2.80 - 11.00	1.90 - 8.00
Diaphragm Blades	7	5
Diagonal Angle of View (degree)	77.00	49.50
Diameter (mm)	55.5	46