Comparison of Fujinon XF 27mm f/2.8 and Pentax SMC DA 40mm ƒ/2.8 XS

Attribute	Pentax SMC DA 40mm ƒ/2.8 XS ×	Fujinon XF 27mm f/2.8 ×
Aperture (f)	2.80 - 22.00	2.80 - 16.00
Filter Size (mm)	27	39
Notes	27mm objective cap and rear cap included.	For Fujifilm X-mount.
Closest Focus (m)	0.4	0.34
Magnification Ratio (x)	0.13	0.1
Diameter (mm)	62.9	61.2
Type	Standard Prime	Wide Prime
APS Equivalent	61mm	41mm
Diaphragm Blades	9	7
Image Circle	APS-C	APS-C (Fujifilm X-mount)
Focal Length (mm)	40.00	27.00
Brand	Pentax	Fujinon
Name	Pentax SMC DA 40mm ƒ/2.8 XS	Fujinon XF 27mm f/2.8
Weight (g)	51	78
Diaphragm Blades Type	rounded	rounded
Lens Construction	5 elements in 4 groups	7 elements in 5 groups, including 1 aspheric element
Diagonal Angle of View (degree)	39.00	55.50
Length (mm)	9.2	23
Front Element Rotation	-	-
Focus Details	AF or MF	AF via high-torque DC coreless motor