Comparison of Panasonic 12.5mm ƒ/12 Lumix G 3D and Pentax SMC P-DA 40mm f/2.8 Limited

Attribute	Pentax SMC P-DA 40mm f/2.8 Limited ×	Panasonic 12.5mm ƒ/12 Lumix G 3D ×
Diagonal Angle of View (degree)	39.00	37.00
Diameter (mm)	63	57
Notes	Distance scale	1 When setting the aspect ratio at 16:9 with the LUMIX DMC-GH2. Included accessories: storage bag.
Aperture (f)	2.80 - 22.00	12.00
Type	Standard Prime	3D Prime
Magnification Ratio (x)	0.13	0.02
Lens Construction	5 elements in 4 groups	4 elements in 3 groups (x 2)
Diaphragm Blades	9	-
Image Circle	APS-C (but we found it didn't vignette on a 35mm film body)	Micro Four-Thirds
Focal Length (mm)	40.00	12.50
Brand	Pentax	Panasonic
Name	Pentax SMC P-DA 40mm f/2.8 Limited	Panasonic 12.5mm ƒ/12 Lumix G 3D
Weight (g)	90	45
35mm Equivalent	-	65mm
Focus Details	"Quick Shift" AF/MF mechanism	Fixed (0.6m / 1.97 ft. to infinity)
APS Equivalent	60mm	-
Length (mm)	15	20.5
Filter Size (mm)	5	-
Closest Focus (m)	0.4	0.6