Comparison of Pentax 15mm f/4 ED AL Limited HD DA and Pentax 15mm ƒ/4 ED AL Limited SMC DA

Attribute	Pentax 15mm ƒ/4 ED AL Limited SMC DA ×	Pentax 15mm f/4 ED AL Limited HD DA ×
Magnification Ratio (x)	0.15	0.15
Filter Size (mm)	49	49
Focus Details	Internal, with "Quick-Shift" focus system	Internal, with "Quick-Shift" focus system
Closest Focus (m)	0.18	0.18
Lens Construction	8 elements in 6 groups	8 elements in 6 groups
Length (mm)	39.5	39.5
Focal Length (mm)	15.00	15.00
Diaphragm Blades Type	-	rounded
Brand	Pentax	Pentax
Image Circle	APS-C	APS-C
Name	Pentax 15mm ƒ/4 ED AL Limited SMC DA	Pentax 15mm f/4 ED AL Limited HD DA
Weight (g)	212	189
Type	Wide Prime	Wide Prime
Notes	Hood is built-in, pullout type	Hood is built-in, pullout type; Available in black or silver; High-grade multi-layer HD (High Definition) coating
APS Equivalent	23mm	23mm
Aperture (f)	4.00 - 22.00	4.00 - 22.00
Diaphragm Blades	7	7
Diagonal Angle of View (degree)	86.00	86.00
Diameter (mm)	63	63