Comparison of Pentax SMC P-FA 28-105mm f/3.2-4.5 AL IF and Pentax SMC P-FA 28-105mm f/4-5.6 IF

Attribute	Pentax SMC P-FA 28-105mm f/4-5.6 IF ×	Pentax SMC P-FA 28-105mm f/3.2-4.5 AL IF ×
Aperture (f)	4.00 - 22.00	3.20 - 32.00
Filter Size (mm)	62	58
Notes	-	Also available in Silver
Closest Focus (m)	0.49	0.5
Magnification Ratio (x)	0.18	0.19
Focus Details	Internal	Internal
Length (mm)	74	66
Focal Length (mm)	28.00 - 105.00	28.00 - 105.00
APS Equivalent	42 - 157.5mm	42 - 157.5mm
Brand	Pentax	Pentax
Image Circle	35mm	35mm
Name	Pentax SMC P-FA 28-105mm f/4-5.6 IF	Pentax SMC P-FA 28-105mm f/3.2-4.5 AL IF
Weight (g)	306	255
Type	Standard Zoom	Standard Zoom
Diagonal Angle of View (degree)	23.50 - 75.00	23.50 - 75.00
Lens Construction	15 elements in 12 groups	12 elements in 11 groups
Zoom System	Rotary	Rotary
Diameter (mm)	71	66