Diffraction ratio
ƒ-stops
(whole)		 Ultraviolet Visible Light Infrared
350 400 470 550 590 665 720 780 830 930 1000
ƒ/1
ƒ/1.1
ƒ/1.3
ƒ/1.4
ƒ/1.6
ƒ/1.8
ƒ/2
ƒ/2.2
ƒ/2.5
ƒ/2.8
ƒ/3.2
ƒ/3.6
ƒ/4
ƒ/4.5
ƒ/5
ƒ/5.6
ƒ/6.3
ƒ/7.1
ƒ/8
ƒ/9
ƒ/10.1
ƒ/11
ƒ/12.7
ƒ/14.3
ƒ/16
ƒ/18
ƒ/20.2
ƒ/22
ƒ/25.4
ƒ/28.5
ƒ/32
Diffraction ratio legend
No visible diffraction (less than 3)
Visible diffraction may slightly impact image sharpness (3 to 4.5)
Visible diffraction will impact image sharpness (4.5 or greater)