Comparison of Pentax 300mm f/4 ED IF SDM SMC DA* and Tokina 70-200mm f/4 AT-X AF PRO FX VCM-S SD

Attribute	Pentax 300mm f/4 ED IF SDM SMC DA* ×	Tokina 70-200mm f/4 AT-X AF PRO FX VCM-S SD ×
Filter Size (mm)	77	67
Notes	Included Accessories: PH-RBK Hood, Detachable Tripod Mount, Case	Optical Image Stabilization (3-stops); Available AF Mounts: Nikon; Included Accessories: Lens hood; Tripod collar optional
Closest Focus (m)	1.4	1
Magnification Ratio (x)	0.24	0.28
Type	Telephoto Prime	Telephoto Zoom
Focus Details	Internal, SDM (Supersonic Motor) with Quick-shift Focus System	Internal with ultrasonic motor
APS Equivalent	450mm	1.5x: 105 - 300mm; 1.6x: 112 - 320mm
Diameter (mm)	83	82
Image Circle	APS-C	35mm
Focal Length (mm)	300.00	70.00 - 200.00
Brand	Pentax	Tokina
Name	Pentax 300mm f/4 ED IF SDM SMC DA*	Tokina 70-200mm f/4 AT-X AF PRO FX VCM-S SD
Weight (g)	1070	980
Aperture (f)	4.00 - 32.00	4.00 - 32.00
Diaphragm Blades	9	9
Diagonal Angle of View (degree)	5.40	12.70 - 34.80
Length (mm)	184	168
Zoom System	-	Rotary
Lens Construction	8 elements in 6 groups	19 elements in 14 groups, including 3 SD elements